Apollo 13 Real-time

Overview

Getting to the Moon and home again involved a small number of broad, basic tasks:

While Apollo was, in aggregate, an immensely complex system comprised of countless components, miles of wiring and circuitry, and cutting-edge-for-the-time technology, we can vastly simplify our effort to understand the spacecraft by approaching it at a high level from these three fundamental problem areas. Each is covered in detail in the Overview section.

There are a few other elemental concepts to understand before diving in:

Redundancy 101

Sending humans into space is a big deal, and it's dangerous. While the basic principles and science behind many aspects of spaceflight may be independently simple, the engineering reality is that things fail. Nearly every NASA mission at this point had a major quirk or two to deal with.

The most robust way to deal with failure is to increase the safety factor by introducing redundant systems. Each Space Shuttle Main Engine, for example, had two computers with two processors each, and a system that would redelegate control if errant calculations were detected. But in the Apollo days, redundancy didn't always mean identical backups. Often, to save weight, money, or complexity, the redundant systems were actually entirely independent designs. Sometimes this could actually be an advantage, as different designs will have different strengths and weaknesses, and thus different failure points.

Both Apollo spacecraft, for example, had one primary navigational sensor: the Inertial Measurement Unit. The IMU was a big powered gyroscope that tracked orientation, much like your smartphone today can detect how it's being tilted and rotated around. The IMU gyroscope was mounted on three freely rotating gimbal axes; it's a lot like turning about while holding a compass, except instead of magnetic force it is the rotational inertia of the spinning gyro that holds the "needle" still, and instead of one axis around which to rotate there are three. This allowed it to read the spacecraft's absolute orientation relative to its static reference angle, much like you can always read your bearing relative to magnetic North on a compass. This allowed great precision and confidence, but it also created a problem state known as gimbal lock, as the three gimbals together couldn't quite follow the spacecraft across certain extreme angles.

The backups to the IMU, then, were known as Body Mounted Attitude Gyros, or BMAGs. There were two of them in the Command Module, and rather than turning about freely on gimbals, they were locked down rate gyros. This meant they could only measure the rate of change of orientation rather than measure the absolute orientation. This is a bit like telling how far you've driven down a highway by sampling your speedometer over time and doing some math: it ought to work, but tiny imprecisions in measurement can throw you off. A really long tape measure will give you an absolute answer with far more confidence, and so the IMU was the preferred instrument. But the BMAGs were lighter, and because no rotating gimbals were involved they were not susceptible to gimbal lock.

Another example is the Abort Guidance System (AGS) on board the Lunar Module. It served as the backup to the Apollo Guidance Computer and some of its associated sensor systems (collectively known as the Primary Guidance, Navigation, and Control System, or PGNCS), in case it failed during a landing. In that case, the landing would be called off and the focus moved to getting back to orbit and rendezvousing with the still-orbiting Command/Service Module for the trip home: a much simpler task. Thus, the AGS had far fewer features than the AGC—and simplicity is often a recipe for greater robustness. You'll hear discussion of using the less power-hungry AGS in lieu of the AGC for the trip around the Moon in the final stages of the audio recording.

Lastly, sometimes redundancy simply wasn't practical. The Command/Service Module had two main DC electrical buses (A and B) that circulated electricity around the spacecraft. With hundreds or thousands of total sensors and components to wire, you can imagine that sending two entire loops of wiring to every single piece of electronics was not only infeasible, it would mean a greater chance of mistakes or accidents, and a far heavier spacecraft. In some cases, this meant that some instruments or components were only available on one bus or the other. In other cases, a hybrid approach was taken: of the three Command Module inverters that converted DC to AC power, for example, the first could only pull electricity off the A bus, the second only the B bus, and the third inverter could draw from either A or B.

Orbital Mechanics 101

Much has been written about this popularly misunderstood and rather counterintuitive topic. We can avoid most of the details here, and instead focus on developing a basic-enough grasp to understand what is happening in these six hours.

The first thing to understand is that given any instantaneous velocity (speed and direction) and position of an object above Earth, we can definitively (with some handwaving) calculate its entire orbit. Somewhat simplistically, this follows from calculating basic Newtonian physics, such as the Universal Law of Gravitation, over time. This observation isn't terribly intuitive or informative on its own, but it helps us think about what happens when we change the two parameters involved: velocity and position. As an example, it is not possible to speed up or slow down without profoundly affecting the shape of one's orbit; this is commonly misunderstood and incorrectly depicted in popular films.

The second thing to understand is just how fast orbital speed is. In Earth orbit roughly 100nm (115mi/185km) above the surface, the Apollo spacecraft would typically be travelling at over 28,000km/h (~17,500mph). Most of a rocket's launch efforts are not invested in pushing the spacecraft up, but rather in hurling it sideways.

The reason this is important to understand is because one must realize how little impact maneuvering or even full engine burns have on a spacecraft's immediate location or trajectory. A typical Apollo mid-course correction burn might modify its speed by somewhere between 20km/h and 150km/h: these changes are minuscule adjustments to the incredibly fast speeds described above, and have next to no impact on the spacecraft's immediate path.

{{figure:orbits-fail}}

Instead, what a burn has far more impact on is the overall shape of the orbit. Let's try this out (figure 1). On the left is a typical Apollo orbit just after launch: the numbers described just above. The orbit and planet are to scale, while the spacecraft is blown up so you can see which way it's burning. Notice how close the orbit is to the surface of the planet, despite the spacecraft being well into space. We want to go to the moon, so let's wait until we're as close as possible, point at it, and burn for a little bit. We will increase our speed by 5,400 km/h to 32,400 km/h.

That didn't work at all. In fact, despite going faster we are now destined to crash back into Earth. This is because we forgot about our second observation, that our burns are relatively small percentages of the spacecraft's base speed. We're not going to be able to overwhelm the momentary velocity taking us parallel to the Moon by adding a small percentage of it towards the Moon.

{{figure:orbits-prograde}}

Let's try working with the speed we already have, then. We'll burn exactly the same amount, just in our direction of travel (figure 2).

That was more interesting. By burning in the same direction as our travel, we modified the opposite side of our orbit by moving it outwards significantly. Remember again: we can change the shape of our orbit by changing our speed, but most changes we can make don't really have much effect on our immediate local path. So all that change goes elsewhere in the orbit: in this case, to the opposite side.

It doesn't matter much today, but this is known as a prograde burn. Of course, if we wanted to go to the Moon, we'd want to do exactly the same thing but on the other side of Earth.

{{figure:orbits-retrograde}}

We can invert this effect by turning around so that instead our engines point in the direction of our travel, and burning. This is called a retrograde burn (figure 3).

{{figure:orbits-subtle}}

The final example (figure 4) demonstrates just how profoundly small changes in velocity can affect the orbit. From an orbit that just reaches the Moon, we'll decelerate by a mere 20m/s—not even highway car speed. It may not look like much on this extreme scale, but that small change is the difference between passing comfortably over the surface of the Earth by a margin of ~1,200,000km (~740,000mi) and smashing into the Earth while trying to pass ~270,000km (~168,000mi) below its surface.

When you listen to the astronauts worry about small details like the particular set of thrusters they are using to point the spacecraft in different directions, it is this effect that they are keenly aware of—particularly with a close approach to the Moon coming up.

There are other types of burns that do different things—we'll cover just one more. Prograde and retrograde burns modify the orbit, but only within the 2D plane in 3D space that the spacecraft is already travelling within. If that plane itself needs to change, this can be done by burning orthogonally to it. But recall again our second observation, that changing our immediate path is really difficult. Changing our plane necessarily involves changing our entire path, including our immediate path. So this is really expensive to do, fuel-wise.

These burn examples illustrate the third thing to understand, which is that much like orbits, burns can be described by two basic parameters: the point in orbit of the burn and the change in velocity (commonly referred to as ΔV). Because rocket engines do not instantaneously modify a spacecraft's speed by tens or hundreds of km/h and because it is easier to keep an eye on a clock than a position in the universe, this is more practically delivered to the astronauts and executed upon with three primary datapoints: clock time of burn, attitude of the spacecraft during the burn, and how long to burn for. (In reality, there are additional parameters for the computer's use, for checking star alignments, and other details.) These figures would be read up and written down on a pre-printed PAD form.

Our last note will be that nothing is ever so clean as presented here. In reality, any object orbiting anywhere in the Solar System is affected by a multitude of gravitational forces, the Earth is not actually spherical nor is its weight distributed evenly, and no burn is ever purely prograde or retrograde or plane change. Many, many factors go into actual orbital and burn calculation. For Apollo, these factors were all calculated on massive computers on the ground over the course of the mission.

Rocketry 101

There is one very important thing to understand about rocketry itself: the fuel is most of the weight you carry into orbit. If you want to go a bit further, you have to add some fuel. But then you also have to carry that fuel to the new, further point you wish to burn it, so you have to add even more fuel just to carry that added fuel—and so on. This game hits diminishing returns pretty quickly, and it's why the Saturn V is as incredibly gigantic as it is.

But the flip-side of this is that the spacecraft gets vastly lighter as it burns that fuel, while the engines remain just as powerful. This means that by the time the spacecraft is on its way to the Moon, for example, and has burned most of its fuel, that little bit of fuel left can cause, percentage-wise, an immense amount of change in spacecraft velocity.

This nonlinearity is why rockets and spacecraft are typically not accounted in terms of liters or gallons of fuel remaining, but rather in ΔV remaining: how much more change in velocity do we have in reserve?

It is also a big factor in the design of the Apollo architecture, as we shall cover briefly.

{{figure:mocr}}

There are many fantastic, complete references on the various flight controllers, their roles, and the people involved. The Ars Technica article is a great, free place to start; the book Go, Flight! goes much deeper into the controllers' history throughout the early years of NASA. Here, we seek to provide enough information such that the real-time audio experience may be fully appreciated.

It is important to note that the flight controllers in the main Mission Operations Control Room (MOCR) were far from the sole engineers and problem-solvers on hand during this or any other mission. There were the Staff Support Rooms (SSRs) in which internal teams backed up each flight controller, each on their own private team audio loop, as well as the Spacecraft Analysis (SPAN) room, in which engineers and other representatives from the various private contractors that actually designed and built the components of the spacecraft were on hand to offer data and analysis. In addition, there were stations all over the world, on sea and on land, which tracked the spacecraft and in doing so provided valuable information and analysis on top of the telemetry they received. Before the time of Apollo, much of this data was not networked back to Houston, and so flight controllers would actually have to be deployed to the various remote stations to directly perform their duties on-site.

Below, we review the controller positions you'll hear from most in the audio. For further information on the other equally important roles, please refer to one of the references linked above.

Flight Director (FLIGHT)

The Flight Director was the ultimate authority during an active mission, charged with ensuring, in order, crew survival and mission success. There were actually multiple teams of flight controllers during any mission, each of which was led by its own Flight Director. You will hear from two today: Gene Kranz and Glynn Lunney. As the center of the room, both figuratively and literally, each Flight Director defined their own style of leadership and set the tone of the room. The differences between Kranz's and Lunney's styles are immediately apparent in the loop audio presented here.

One of the tools Flight had in managing their relatively sizable team was a set of manually toggled status lights, one for each flight controller. In addition to their use during go/no go calls, Flight would often call for their use as a status indicator for various critical room-wide issues, such as shift changes and status updates.

Electrical, Environmental, and Consumables Manager (EECOM)

As the poor sap in charge of the electrical and cryogenic gas systems that got literally blown up during Apollo 13, EECOM is the flight controller from whom you will hear the most in the early stages of diagnosis. EECOM's purview included both electrical power and life support systems, as these systems were intertwined in their reliance upon the same cryogenic gases. These systems included gas storage and distribution, the fuel cells, batteries, alternators, and electrical buses, and the various life support and regulator valves that maintained a habitable atmosphere within the spacecraft. As implied by the name, monitoring and managing the consumption of the consumable gas (and therefore electrical) resources were also EECOM's charge.

During Kranz's shift and the initial incident, you will hear EECOM Sy Liebergot, who at one early point was described as staring at his telemetry readouts with a two-handed death grip on the handles of his display. Clint Burton takes over as part of Lunney's team—he oversees most of the power-down procedure of the CSM.

Guidance, Navigation, and Controls Systems Engineer (GNC)

GNC managed all of the go-there systems: the propulsion hardware, the RCS attitude thrusters, the propellant to be burned, and the navigation instruments and software, including the guidance computer. The explosion broke many things loose, jarred many valves open or shut, and knocked electrical buses offline, and so GNC makes frequent appearances in the first hour or so following the incident to try to find a combination of RCS thrusters that are trustworthy to put on the working electrical bus, and to shut down errant thrusters which were pushing the craft about or wasting power while failing to fire.

Said appearances are made by Bill Strable, who is then relieved by Jack Kamman with Lunney's Black team.

Guidance Officer (GUIDO)

The Guidance Officer was in charge of the spacecraft position and attitude at all times, and the appropriate use of the attitude adjustment and propulsion systems to ensure smooth operations. As an example, you will hear GUIDO crop up when the spacecraft nears gimbal lock, a condition which would invalidate all available understandings of spacecraft orientation until a lengthy recalibration could be performed. You'll also hear him talk about some of the various control modes of the spacecraft that translate crew input into thruster firings.

Bill Fenner and Ray Teague serve as White team GUIDO, while Gary Renick and Will Presley take over as part of Black team.

Flight Dynamics Officer (FDO)

Down in the spirited Trench of the room, FDO managed spacecraft trajectory, both present and into the future. Where GNC and CONTROL managed the propulsion and attitude control hardware and software systems of the CSM and LM, respectively, and GUIDO was in charge of their actual, immediate use, FDO worked one level above that, formulating and overseeing the navigation and maneuver plans required to deliver the spacecraft where it needed to go. FDO collaborated with a variety of people, both on and off campus, to determine and calculate the necessary orbital maneuvers required to achive mission success.

Bill Stoval is FDO for Kranz's White team, and Bill Boone and Maurice Kennedy take over at shift change.

Integrated Communications Officer (INCO)

INCO was in change of communications for both spacecraft. These included the telemetry systems, and the various omnidirectional and steerable antennas upon each craft. In addition to managing the on-board equipment to ensure quality of signal and successful data operations, INCO worked with NETWORK and PROCEDURES to coordinate appropriate related reconfigurations of the ground-air link from both ends of the connection.

INCO pipes up quite a bit in the audio to ask for antenna changes as the spacecraft attitude is somewhat out of control following the accident; INCO is also a key player and communicator in identifying and resolving the LM/S-IVB communications issues that occur midway through the Black team shift.

The White team INCO was Alan Glines, and the Black team INCOs were Gary Scott and Ed Fendell.

Telemetry, Electrical, and EVA Mobility Unity Officer (TELMU)

TELMU was effectively the EECOM of the Lunar Module, responsible for many of the respective systems aboard the LM. As the Lunar Module lifeboat plan becomes increasingly real and correspondingly pressing, TELMU has to oversee an emergency startup of the LM, working with the crew on board to safely power up the spacecraft in literal record time. Later, TELMU is a key player in determining a low-power configuration that can bring the crew safely home while maintaining navigation.

Kranz's TELMU was Bob Heselmeyer, and Lunney's TELMU was Merlin Merritt.

Control Officer (CONTROL)

Where TELMU is effectively the EECOM of the Lunar Module, CONTROL is effectively the GNC. In addition to overseeing the navigation and propulsion systems during powerup and the lunar-bound correction burn following the accident, the heavy debate had by Lunney's team on maintaining platform control on a low electricity budget hinged on the navigation systems overseen by CONTROL.

During Kranz's shift, CONTROL was Larry Strimple. He was relieved by Hal Loden for Lunney's shift.

Capsule Communicator (CAPCOM)

CAPCOM was, with exceedingly rare exception, the only person allowed to talk directly to the crew. This allowed him to ensure the consistency, coherency, and accuracy of instructions and information transiting to and from the crew, and to translate to and from terms and descriptions more-familiar to the astronauts. The latter effort was aided by a convention that CAPCOMs were drawn from the astronaut pool.

Jack Lousma serves as CAPCOM throughout all available audio here. He later flew aboard the Skylab 3 mission, and commanded one of the very first Space Shuttle missions, STS-3.

End of tape.

After six hours of continual crisis, Apollo 13 is now safely back on a trajectory towards Earth, with a stable configuration and no immediate dangers. The Command Module is completely dark, and the crew is preparing to bring Aquarius down to a minimal state. It would eventually transpire, after some on-board experimentation with different solutions, that because of the added cost of the inverter required to keep the navigation eight-ball running, it was cheaper in total to leave the whole PGNS system running in Attitude Hold mode to prevent gimbal lock rather than having the crew watch the drift manually. For thermal control, the crew were simply instructed every so often to manually move the stack around to different attitudes.

Following the PC+2 past the far side of the Moon, even Aquarius would be powered down completely apart from COMM and life support, in order to conserve power. When a final midcourse correction was required after this, the infamous manual burn dramatized in the film was performed, as power could not be spared to power up the entire computer system.

Over the next many hours and days, many more problems need to be solved: the LiOH canisters mentioned briefly by Glynn Lunney deplete, and a makeshift adapter has to be fashioned for spares from the Command Module to be used in order to prevent a buildup of carbon dioxide; extensive resource planning is done to stretch consumables far past their designed limit; the crew deals with hypothermic conditions and dangerously scant water rations while demanding tasks continue to be required; an entirely new hours-long Command Module power-up procedure must be developed, tested, and successfully read over voice to an exhausted Jack Swigert to ensure a successful re-entry, a process that by all rights should take weeks rather than days.

Hopefully, you have not only enjoyed these six hours of audio, but as well gained a new appreciation and tactile understanding of what it was like to hurl Apollo through the heavens. If you wish to delve yet further into Apollo and spaceflight, please take a look at the further reading section.

If you have feedback or questions, please don't hesitate to send me a tweet or file a GitHub issue.

Photo Credit: NASA, with scans by Kipp Teague.

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EVA
554646
CAPCOM
Okay FLIGHT, you read his pitch and yaw and his high-gain meter.
554650
FLIGHT
That's affirmative.
554651
CAPCOM
And now you want roll right to 060?
554656
FLIGHT
Might as well do that. And we'll try and get Comet Bennett, I'd still like the verification on the docking angle because that's what we'll be using for computation for alignments and everything else. Let's see if there's anything else.
554708
EECOM
FLIGHT, EECOM.
554709
FLIGHT
Go ahead, EECOM.
554710
EECOM
Okay, let's terminate the battery B charge at 55 +50.
554714
FLIGHT
Okay.
554715
EECOM
And at the same time, I'd sure like to have a cryo stir, all 4 tanks.
554720
FLIGHT
Let's wait until they get settled down a little more.
554722
EECOM
Roger.
554723
GNC
FLIGHT, GNC.
554724
FLIGHT
Go, GNC.
554725
GNC
I would still like to enable the other two quads for the maneuver.
554729
FLIGHT
Okay. When rolling to 060 you want them to enable C and D, right?
554735
GNC
Right.
554736
FLIGHT
Do you want them to disable A and B?
554738
GNC
No.
554738
FLIGHT
Okay. All four quads.
554740
GNC
They have coupled jet maneuvers -
554742
FLIGHT
Roger. Copy, CAPCOM?
554744
CAPCOM
Got it.
554746
INCO
FLIGHT, INCO.
554747
FLIGHT
Go, INCO.
554747
INCO
I'd like to confirm their configuration on their high-gain now.
554750
FLIGHT
Okay.
554751
INCO
I'd like to know what track mode they're in and what SERVO electronics they're in.
554756
FLIGHT
Okay, let's just standby 1 there. Now we'll C and D for roll to 060, terminate battery B charge.
554810
FLIGHT
Okay, the third thing we want up there, CAPCOM, is to verify their high-gain configuration. And I assume what you want from there is you want to know their tracking, position of track - BEAM WIDTH you don't need, do you? Do you want the whole works?
554825
INCO
Yeah, the whole works.
554825
FLIGHT
Okay.
554831
FLIGHT
CAPCOM, we want the configuration of the CSM high-gain.
554934
INCO
That's good.
554935
FLIGHT
Okay.
555005
FLIGHT
Good report.
555009
GNC
FLIGHT, GNC.
555010
FLIGHT
Go, GNC.
555011
GNC
Can we verify that they reenabled C-4 thruster?
555020
FLIGHT
Okay. Verify that they re- - you're showing that disabled, yes?
555023
GNC
Yes.
555024
FLIGHT
CAPCOM, restore CM C-4 thruster; disabled.
555033
EECOM
FLIGHT, EECOM.
555034
FLIGHT
Go EECOM.
555034
EECOM
You've got 40 amp-hours back in battery B now.
555037
FLIGHT
Okay.
555042
EECOM
You got it, FLIGHT.
  • Possibly in response to seeing BAT B charge disabled.
555043
FLIGHT
Okay.
555054
FLIGHT
Okay, all flight controllers. I want to go around the horn and pick up anything you need configuration-wise. TELMU -
555101
TELMU
Go ahead, FLIGHT.
FLIGHT
- you still worried about any configuration items?
555106
TELMU
Negative. The LM heater current indicates that the LM was properly closed out. They apparently have not closed the LM hatch yet.
555114
FLIGHT
Okay. So you're happy that you don't need them to verify that - what was it, activation 2-3, those pages we were on?
555121
TELMU
That's right. That was TLC 2, and we're happy.
555124
FLIGHT
Okay.
555127
GUIDO
FLIGHT, GUIDANCE.
555129
FLIGHT
Go, GUIDANCE.
555130
GUIDO
Can we ask about the docking index again?
555133
FLIGHT
CAPCOM will get that for me.
555155
FLIGHT
Okay. Got your answer, GUIDANCE?
555157
GUIDO
Roger, FLIGHT.
555158
FLIGHT
Okay, go with it.
555231
FLIGHT
Okay. GNC, you got any configuration items here?
555235
GNC
Negative, FLIGHT.
555237
FLIGHT
CAPCOM, looks like the last item we need here is a stir on H₂ and O₂ at their convenience.
  • The fateful but inevitable request.
555244
CAPCOM
Okay.
555356
GUIDO
FLIGHT, GUIDANCE.
555359
FLIGHT
Go, GUIDANCE.
555400
GUIDO
We finally got a ∆H update. Do you want to just read it up to the crew or uplink it?
555408
FLIGHT
Let's see, now. Can we collapse deadbands and do all that good stuff if we uplink here?
555418
GUIDO
Uh. Yeah. That - why don't we just read it up to them?
555423
FLIGHT
If they enter it through the DSKY are they gonna do it?
555426
GUIDO
Standby 1.
555430
FLIGHT
Now, we haven't stabled out at that attitude yet, so I don't think we're gonna have any problems.
555434
GNC
FLIGHT, I don't think there's any problem, they haven't opened up deadbands yet.
555437
FLIGHT
Yeah, that's just what I'm saying. The time to do it is now, GUIDANCE.
555441
GUIDO
FLIGHT, GUIDANCE.
555442
FLIGHT
Go, GUIDANCE.
555443
GUIDO
As long as he's in P00 and don't reselect it, he can uplink it - enter it himself or we can do it easier. Doesn't matter.
555457
FLIGHT
Okay. Why don't - you gotta pass the data for the crew checklist anyway on-board, don't you?
555504
GUIDO
Right.
FLIGHT
Don't you got a page update? Well, why don't we read it up to them and that'll serve both purposes.
555510
GUIDO
Alright.
555510
FLIGHT
Both have them enter it as well as why don't you tell them what page you want it in the checklist?
555514
GUIDO
Okay.
555518
TELMU
FLIGHT, TELMU.
555518
FLIGHT
Go, TELMU.
555519
TELMU
We show the LM overhead hatch is closed, and the heater current looks normal.
555523
FLIGHT
Okay.
555526
GUIDO
FLIGHT, GUIDANCE.
555527
FLIGHT
Go, GUIDANCE.
555527
GUIDO
We've had a hardware restart. I don't know what it was.
555529
FLIGHT
Okay. GNC, you want to look at it? See if you see any problems?
555537
FLIGHT
Roger. We're copying it, CAPCOM. We see a hardware restart.
555541
FLIGHT
You see an AC BUS UNDERVOLT there, GUIDANCE? Err - EECOM?
555546
EECOM
Negative, FLIGHT.
555548
FLIGHT
I believe the crew reported it.
555550
CAPCOM
We've got a MAIN B UNDERVOLT.
555551
EECOM
Okay, FLIGHT, we've got some instrumentation funnies, let me add them up.
  • Having missed the pre-explosion pressure spike on tank 2, all EECOM has to work with now is a Christmas tree of bad data readout. So many numbers were off whack all of a sudden that EECOM assumes it has to be instrumentation. Lengthy discussion ensues on the EECOM loop.
  • Poor Sy had a "two-handed deathgrip" on his console by now.
555554
FLIGHT
Roger.
555600
EECOM
We may have had an instrumentation problem, FLIGHT.
555603
FLIGHT
Roger.
555607
INCO
FLIGHT, INCO.
555608
FLIGHT
Go, INCO.
555609
INCO
We switched to WIDE BEAM width about the time we had the problem.
  • A red herring, but a believable one if the problem were instrumentation or telemetry.
555633
FLIGHT
Okay.
555642
FLIGHT
INCO, you say you went to WIDE BEAM width there?
555644
INCO
Yes.
555649
FLIGHT
Let's see if we can correlate those times. Get the time when you went WIDE BEAM, INCO.
555655
INCO
Okay.
555702
CAPCOM
Do we have the floodlights off right now?
555704
TELMU
That's affirmative, FLIGHT.
555705
FLIGHT
Yeah, we can determine that from the LM current.
555737
FLIGHT
Roger, we copy that also.
555813
FLIGHT
EECOM, you see any AC problems? Looks like -
555815
EECOM
FLIGHT, EECOM.
FLIGHT
- we have a lot of instrumentation problems here. Go ahead.
555818
EECOM
That's affirm. He's flipping the fuel cells around, FLIGHT.
  • This ended up being a problem for the flight controllers. The astronauts were doing their own problem solving and configuration changes, so every time the controllers on the ground had a recommendation for them something would get changed and they'd have to start over.
555823
FLIGHT
Well, let's get some recommendation here, Sy, if you've got any better ideas.
555832
FLIGHT
Sy, what do you want to do? Hold your own, and -
555840
FLIGHT
- Sy, have you got a SIG SENSOR type problem there, or what?
555843
EECOM
FLIGHT, EECOM.
555844
FLIGHT
Go ahead.
555845
EECOM
He's got fuel cells 1 and 3 are offline. We've got MAIN A volts, we have no MAIN B volts. Have them attempt to reconnect the fuel cells. FUEL CELL 1 to MAIN A, FUEL CELL 3 to MAIN B.
555902
FLIGHT
Okay.
555903
EECOM
We just gotta -
FLIGHT
FUEL CELL 1 -
EECOM
- back to MAIN A, FUEL CELL 3 back to MAIN B.
FLIGHT
- MAIN A, 3 to MAIN B.
555910
EECOM
Let's see what happens.
555911
FLIGHT
Okay, now is there - do we have instrumentation problems?
555916
EECOM
Well, we've lost - it does appear we've lost AC BUS 2 VOLTAGE. MAIN B is reading - 4 volts. And that effectively takes AC 2 away from us -
555929
FLIGHT
Okay.
EECOM
- the - yeah and he reported barber poles on the -
555935
FLIGHT
Roger.
EECOM
- on the fuel cell on-board, too, FLIGHT.
555936
FLIGHT
(unintelligible) yeah.
555938
GNC
FLIGHT, GNC.
555939
EECOM
Let's see if we can get our DC back.
555940
FLIGHT
Roger. Go ahead, GNC.
555941
GNC
Verify that the Quad Delta HELIUM VALVES are open.
555946
FLIGHT
You seeing an attitude problem or you seeing some BI-levels that are giving you problems?
555951
GNC
No, it's some low pressures in the fuel and oxidizer which would be symptomatic of the HELIUM VALVE closing and firing some jets.
  • Here he means these two things both happening, not that the valve closing would cause jet firing. Helium is used as an inert gas to maintain pressure in many propellant tanks even today. If the helium isn't coming in, propellant gas exits the tank without anything re-entering to keep the pressure up.
  • Kranz notes that this was a moment of realization for him; the reported bang must have been pretty strong to have jarred shut the valve. He'd seen something similar on Apollo 9 during CSM/S-IVB separation.
555959
FLIGHT
Quad number 2 HELIUM VALVE open?
560001
GNC
Quad Delta.
560002
FLIGHT
Quad Delta - HELIUM VALVE open, right?
560005
GNC
Right.
560010
FLIGHT
CAPCOM, do you want to verify the Quad Delta HELIUM VALVE is open, please.
560016
FLIGHT
Are there other problems in the RCS, Buck?
560020
CAPCOM
Okay, is that all we've come up with for them; have we got any other recommendations?
  • CAPCOM is anxious.
560025
FLIGHT
Yeah, we wanted to get FUEL CELL 1 configured to MAIN A, FUEL CELL 3 to MAIN B. Did you pass that up?
560032
EECOM
Let's attempt that, FLIGHT.
560037
FLIGHT
INCO, this seems to be an AC type problem, it may be tied into that high-gain thing you got.
560045
INCO
We went to WIDE BEAM with - FLIGHT - at 55:55:04, best we can tell.
560049
FLIGHT
Okay.
560106
EECOM
I copy, FLIGHT.
560109
EECOM
Let me commiserate on that.
560116
CAPCOM
Is there any kind of leads we can give them? Are we looking at instrumentation or have we got a real problem, or what?
  • The lack of answer here is telling. At some point here, steely-eyed missile man and NASA legend EECOM John Aaron had gotten called at home. He asked for some numbers to be read out, and while bolting out the door warned them that whatever it was, it wasn't instrumentation.
560134
EECOM
FLIGHT, EECOM.
560135
FLIGHT
Go, EECOM.
560136
EECOM
Let's reverse the configuration request -
560138
FLIGHT
Okay, but wait a minute. We've got a good MAIN A BUS, let's make sure that whatever we do doesn't screw up MAIN A. MAIN A -
560143
EECOM
FUEL CELL 2 is on MAIN A, FLIGHT -
560145
FLIGHT
Okay.
EECOM
- and I'm not going to ask to change that.
560147
FLIGHT
Okay, what do you want to do?
560148
EECOM
Let's try to put FUEL CELL 1 on MAIN B, FUEL CELL 3 on MAIN A. We'll use the other sensing circuitry.
560157
FLIGHT
FUEL CELL number 1 on MAIN B -
560200
EECOM
- FUEL CELL 3 on MAIN A.
560209
EECOM
We're not going to touch FUEL CELL 2, FLIGHT.
560212
FLIGHT
Okay, but if we got any problems in the system I want to make sure that we don't blow the voltage off MAIN A, then we're not going to be able to see anything.
560228
FLIGHT
Can we review our status here, Sy, and see what we've got from a standpoint of status. What do you think we've got in the spacecraft that's good?
560235
EECOM
MAIN BUS A is reading 25 volts.
560238
FLIGHT
Okay. MAIN A -
560239
EECOM
And that's reflected by the fact - FUEL CELL 2 is putting out 53 amps, which is just about the most it can and keep our voltage up.
560248
FLIGHT
Okay.
560248
EECOM
So that's bona fide. AC BUS 2 is 0, which is reflected by the fact that we lost MAIN B.
560255
FLIGHT
AC BUS -
560259
EECOM
Standby, FLIGHT.
560303
FLIGHT
- zero output.
560307
EECOM
FLIGHT, EECOM.
560313
FLIGHT
Go ahead, EECOM.
560314
EECOM
Okay. If we want to keep - - standby, he's changed configuration, we've got BATTERY A on MAIN A.
560327
FLIGHT
Go ahead.
560327
EECOM
That's what I was going to ask you for, to put the battery on, FLIGHT.
560330
INCO
FLIGHT, INCO.
560331
FLIGHT
Go, INCO.
560331
INCO
We need OMNI Bravo. Our high-gain won't drive without AC 2.
  • The steerable antenna needed AC BUS 2 to power its servos.
560337
FLIGHT
Okay. You want OMNI Bravo?
560339
INCO
Right.
560348
FLIGHT
You don't think we're going to be able to get HIGH BIT RATE data here, do you? On the OMNIs.
560353
INCO
We may be. We've got the 210s.
560354
FLIGHT
You've got the 210s -
560356
INCO
Right.
FLIGHT
Okay, that'll save a bit of power. CAPCOM, recommend selection of OMNI Bravo, please -
560402
INCO
It's Charlie now.
FLIGHT
Okay, Charlie.
560403
INCO
He's maneuvering.
560405
CAPCOM
OMNI Charlie?
560406
FLIGHT
That's affirmative.
560406
INCO
Roger.
560427
INCO
Okay, FLIGHT, we've got OMNI Charlie and HIGH BIT RATE.
560431
FLIGHT
Okay. You have HIGH BIT RATE now off the 210s, right? OMNI -
560434
INCO
Right.
FLIGHT
Okay.
560458
EECOM
FLIGHT, EECOM.
560459
FLIGHT
Go, EECOM.
560500
EECOM
Okay. Let's get a readout on a couple of fuel cell pressures here -
560504
FLIGHT
Okay.
EECOM
- FUEL CELL 1 N₂ pressure. FUEL CELL 3 O₂ pressure. We're reading 0 N₂ pressure on FUEL CELL 1 and 13psi on FUEL CELL 3 O₂ pressure.
  • Nitrogen was used to pressurize the electrolytes in the fuel cell through a diaphragm, as well as the reactant feed systems. Feedback loops are set up with the cryogenic oxygen to regulate the relative pressures.
560518
FLIGHT
Okay, you want FUEL CELL 1 -
560521
EECOM
N₂ pressure.
FLIGHT
- N₂ pressure. FUEL CELL 3, what do you want there?
560526
EECOM
O₂ pressure.
560527
FLIGHT
O₂ pressure. CAPCOM, let's get those as a start.
560533
GUIDO
FLIGHT, GUIDANCE.
560534
FLIGHT
Go, GUIDANCE.
560535
GUIDO
When his hardware restart he was doing a clearly fine maneuver, and that should have killed it, but we're still moving. We ought to stop it.
560545
FLIGHT
Are we using RCS now, Buck?
560558
FLIGHT
GNC, from FLIGHT.
560602
FLIGHT
GNC, from FLIGHT.
560604
GNC
GNC.
560605
FLIGHT
Did you see any problems in Quad D HELIUM VALVE? Does that look like that's cleared up?
560608
GNC
Roger, that's cleared up, FLIGHT, we're in good shape.
560610
FLIGHT
Okay. Now, are we using RCS now?
560612
GNC
That's affirmative, we're going to have to switch some thrusters to MAIN A to hold attitude here.
  • Because the thrusters required electrical power to operate and MAIN B was dead, a lot of them had to be switched around to the other bus to maintain operation.
560617
FLIGHT
Okay. How much RCS are we using?
560622
GNC
Oh, we've used - our guess 25 pounds.
560627
FLIGHT
Okay. Give me minimum fuel usage configuration that'll keep me attitude.
560632
GNC
Roger.
560633
TELMU
FLIGHT, TELMU.
560634
FLIGHT
Go, TELMU.
560635
TELMU
The LM heater current's become essentially static.
560638
FLIGHT
Roger. Let's solve one problem at a time. Come back to me later on on it.
560705
CAPCOM
We confirming those numbers?
560720
FLIGHT
Buck, I need that RCS stuff as soon as you can get it.
560722
GNC
Roger, FLIGHT. He's turned off all jets now.
560724
FLIGHT
Okay.
560726
CAPCOM
Okay, we came up with those numbers, FLIGHT.
560729
FLIGHT
Okay, Sy. Give me your next best thing to try.
560746
FLIGHT
EECOM, from FLIGHT.
560747
EECOM
FLIGHT, EECOM.
560748
FLIGHT
Go ahead.
560751
EECOM
Why don't we try - leave FUEL CELL 2 alone, and just make sure that 1 and 3 are disconnected from both buses. And make sure that there's abs - that there won't be any load on them at all. And let's see what happens to those cells.
  • n.b. this is shutting off the output electrical circuit of the fuel cells, not the fuel cells themselves, which remain on.
  • Since the fuel cell electricity was produced via a chemical reaction, reducing the electrical output load would reduce the reaction rate, which could have an impact on the problem.
560806
FLIGHT
Okay, what do you want to do? Open-circuit FUEL CELL 1 and 3?
560809
EECOM
That's affirm, flight.
560810
FLIGHT
Okay. CAPCOM, let's recommend we open-circuit FUEL CELL number 1 and number 3 and leave FUEL CELL number 2 as-is.
560821
CAPCOM
Okay, 1 and 3 open-circuit, 2 as-is. And earlier we got a report from them that 1 and 3 were reading grey but zero flow.
  • Connected to the circuit. An open circuit would yield a barber pole.
560829
FLIGHT
Yeah - CAPCOM, let's amend that. EECOM, from FLIGHT.
560832
EECOM
FLIGHT, EECOM.
560833
FLIGHT
Why don't we just open-circuit 1 and make sure we don't have any problems getting that back onto the bus -
560838
EECOM
Okay, FLIGHT.
FLIGHT
- and just watch it for a while before we make any further moves with 3.
  • FLIGHT's caution is probably well-advised here, but the last-minute change is dropped by EECOM; later he still thinks both 1 and 3 have been open-circuited.
560841
EECOM
Roger.
560841
FLIGHT
Okay, CAPCOM. Let's just open-circuit one of those right now.
560857
GNC
FLIGHT, GNC.
560905
EECOM
That's roger, FLIGHT. That's the AC problem.
560908
FLIGHT
Roger.
560916
FLIGHT
Crew thinks they're venting something.
560918
EECOM
I heard it, FLIGHT.
560928
CAPCOM
Copy that, FLIGHT?
  • Pretty much as worked-up as the room gets.
560929
FLIGHT
Roger.
560933
FLIGHT
Okay, let's everybody think of the kinds of things that we'd be venting. GNC, you got anything that looks abnormal in your system?
560939
GNC
Negative, FLIGHT.
560943
FLIGHT
How about you, EECOM? You see anything that - with the instrumentation you've got that could be venting?
  • One can imagine EECOM here staring at his readouts and thinking "yes, FLIGHT, everything!"
560953
EECOM
That's affirm, FLIGHT.
561001
EECOM
Let me look at the system, FLIGHT, as far as the venting is concerned.
561003
FLIGHT
Okay. Let's start scanning. I assume you've called in your backup EECOMs?
561010
FLIGHT
EECOM?
561011
EECOM
FLIGHT, say again?
561012
FLIGHT
Have you called in your backup EECOMS now? See if we can get some more brain power on this thing?
561015
EECOM
We got one here.
561016
FLIGHT
Roger.
561017
INCO
FLIGHT, INCO.
561018
FLIGHT
Go, INCO.
561018
INCO
He's - he's - never mind, he's straightening up a little bit.
561021
FLIGHT
Okay.
561046
FLIGHT
Okay, now, let's everybody keep cool. We've got the LM still attached, the LM spacecraft is good, so if we need to get back home we've got a LM to do a good portion of it with. Okay? Let's make sure we don't do anything that's going to blow our CSM electrical power with the batteries, or that will cause us to lose the MAIN - the FUEL CELL number 2. We want to keep the O₂ and that kind of stuff working, we'd like to have RCS. But we've got the Command Module system, so we're in good shape if we need to get home. Let's solve the problem, but let's not make it any worse by guessin'.
  • Note the repeated use of "if" here. The severity of the problem was not yet fully understood.
  • As noted elsewhere, FLIGHT likely meant LM here.
561147
GNC
FLIGHT, GNC.
561150
FLIGHT
Go, GNC.
561151
GNC
I have some jet configurations for you whenever you need them.
561154
FLIGHT
Okay.
561157
FLIGHT
Give them to me.
561201
GNC
Okay. Charlie 3, Charlie 4 to MAIN A. Bravo 3 and Bravo 4 to MAIN A. Charlie 1 and Charlie 2 to MAIN A -
561213
FLIGHT
Standby.
561221
GNC
Yeah; it's all of quad Charlie on MAIN A.
561224
FLIGHT
Okay.
561225
GNC
Plus Bravo 3 and Bravo 4.
561229
FLIGHT
Now, what are we going to be doing with these, GNC?
561232
GNC
That'll give us one jet in each direction on each axis.
561235
FLIGHT
Okay.
561236
GUIDO
FLIGHT, GUIDANCE.
561236
FLIGHT
Go, GUIDANCE.
561237
GUIDO
He's getting close to gimbal lock.
561239
FLIGHT
CAPCOM - okay, CAPCOM, recommend he bring up C-3, C-4, B-3, B-4, C-1, C-2 on MAIN A and advise him he's getting close to gimbal lock.
561252
FLIGHT
GUIDANCE, from FLIGHT.
561253
GUIDO
Go ahead.
561253
FLIGHT
Could we go to a coarse align on the platform here, so we don't have to use any gas if we need to? We could reorient if necessary.
561302
GUIDO
Roger. I was going to recommend a P52 in a little bit anyway -
561305
FLIGHT
Well, it's going to take a while before we get to the point we're even thinking about a P52.
561309
GUIDO
Yeah.
561312
FLIGHT
Yeah, it'll coarse align itself there, won't it?
561318
GUIDO
It'll coarse align at -
561319
FLIGHT
Roger.
GUIDO
- any time itself.
561410
FLIGHT
Okay, EECOM. I'm coming back to you.
561413
EECOM
FLIGHT -
561414
FLIGHT
Go ahead.
EECOM
- I think the best thing we can do right now is start a power down.
561419
FLIGHT
Okay -
561420
EECOM
Let's go down the emergency 1-5.
561424
FLIGHT
You want to power down, let us look at the TM and all that good stuff, and then come back up.
561429
EECOM
That's affirm.
561430
INCO
FLIGHT, INCO. OMNI Bravo.
561432
FLIGHT
You want OMNI Bravo again?
561434
INCO
Right.
561434
FLIGHT
On board. OMNI Bravo.
561442
FLIGHT
CAPCOM, recommend OMNI Bravo.
561447
FLIGHT
Okay. What - you want to go to - power down - give me the page.
561451
EECOM
Emergency 1-5, FLIGHT, we'll go down - try to get a delta of 10 amps reduction.
561514
INCO
Okay, we've got OMNI Bravo, FLIGHT.
561522
FLIGHT
EECOM, do you want to go through that again? What do you want to power down to?
561525
EECOM
I want to power down a total of 10 amps, FLIGHT.
561528
FLIGHT
A total of 10 amps.
  • You can hear someone (FLIGHT, perhaps?) whistle in amazement at this.
561530
EECOM
That's affirm.
561531
FLIGHT
Okay.
561535
FLIGHT
CAPCOM, we'd recommend emergency power down checklist 1-5, we want to power down a total - a delta of 10 amps from where we are now.
561544
GNC
FLIGHT, GNC.
561545
FLIGHT
Go, GNC.
561545
GNC
Can we afford to do a PTC first, and then we can shut off all of that stuff with no problems.
  • As FLIGHT notes later, this is not a possible request.
561551
FLIGHT
Why? You think you're going to have a thermal problem here?
561553
GNC
Well, we could have - if we stay there too long, or we -
561556
FLIGHT
Okay, we'll run into that one later, Buck -
561559
GNC
Okay.
FLIGHT
- I want to get our major problems sorted out now.
561602
CAPCOM
You want - you still want 1-5 down to 10 amps?
561604
FLIGHT
1-5 power down a delta of 10 amps, CAPCOM.
561632
FLIGHT
EECOM, from FLIGHT.
561634
EECOM
Go, FLIGHT.
561635
FLIGHT
You don't want to get fuel cell pumps off, do you?
561644
FLIGHT
Optics power is already off, I believe.
561647
EECOM
We can do that on FUEL CELL number 1, FLIGHT.
561650
FLIGHT
Okay, well let's make sure we don't blow the whole mission.
  • Kranz himself writes that he realized within fifteen minutes that an oxygen tank had exploded and therefore the "mission" referred to here was now survival, not a lunar landing. But it is not clear if the entire room was on this page quite yet.
561720
EECOM
FLIGHT, EECOM.
561721
FLIGHT
Go, EECOM.
561722
EECOM
Would you not want to consider going to PTC?
  • Echoing GUIDO's suggestion earlier. Still not possible, as FLIGHT points out later.
561726
FLIGHT
Well, why don't we get this problem here resolved, right now -
561730
EECOM
This will aid our power down, I think -
561732
FLIGHT
Pardon?
EECOM
- this should aid our power down, I'd hope - wouldn't it?
561737
FLIGHT
Well, do you expect that we're going to be in a thermal problem for the next many hours? EECOM?
561744
EECOM
Well, don't know where to say the sun is right now, FLIGHT.
561747
GNC
Well, it's pretty close to quad A right now. Are we -
561751
EECOM
By 90 degrees?
561754
GNC
I don't know exactly where. It's between A and B, mostly on A.
  • He's likely deducing this from temperature sensors in the RCS thruster packages.
561832
FLIGHT
GNC, from FLIGHT.
561837
FLIGHT
GNC, from FLIGHT.
561840
GNC
GNC.
561842
FLIGHT
Buck, I'd prefer not making any unnecessary maneuvers now, or try to use any of the equipment's on board the spacecraft, such things as CMC, that type of stuff until we nail down what our problem is.
561855
GNC
Well, that's why I was recommending PTC because we don't need any of that stuff then; heaters or anything else.
  • The RCS system involved warming heaters to ensure everything fired as expected.
561859
FLIGHT
Yeah, but you gotta get the CMC on, and keep it online. And you need a rather precise period of time for redamping there.
561910
GNC
In the order of about 20 minutes to damp out and spin up and then we don't need any of that.
561918
GNC
If we get a good spinup going then we're stable -
561919
FLIGHT
Okay, that might be a good idea. That would buy us some time from a standpoint of reviewing the data. And it would get us back into the - as close to the normal flight plan as we could. How far are we out of attitude right now?
561938
GNC
He's a fair ways out right now, FLIGHT. He'd do another VERB 49 and fly back and then stabilize there.
562057
EECOM
FLIGHT, EECOM.
562058
FLIGHT
Go, EECOM.
562058
EECOM
Okay, I need one thing right now. He's powering down, he's down to 41 amps, total spacecraft. I'd like to get my AC 2 BUS back so I can look at O₂ TANK 2 PRESSURE. I have no insight into that.
562112
FLIGHT
Okay.
562113
EECOM
Let's get - I guess we can put INVERTER 3 to MAIN A. AC 2.
562123
EECOM
Let's just do it temporarily -
562123
FLIGHT
Now, let me ask you a question - before you do that would you like to make sure you've got all AC load you don't need isolated from the bus?
562132
EECOM
Nah, it - let's not do that right now, FLIGHT. I think we're in good shape that way. The MAIN A is up high enough where it can handle the inverter.
562140
FLIGHT
Well, the thing that concerns me is starting - is throwing equipment - we had a problem, we don't know the cause of the problem, and -
562146
EECOM
FLIGHT, I've got a feeling we've lost two fuel cells. I hate to put it that way, but - I don't know why we've lost them. It doesn't all tag up. And it's not an instrumentation problem, the best I can tell right now.
  • The other shoe drops. 27 minutes past the accident, and the picture is becoming clearer. The situation is dire. Only one fuel cell remains, and the gas for it is leaking slowly out to space.
562200
FLIGHT
Okay, I'll tell you what. Let's discuss this for just a little bit longer there, Sy. CAPCOM, start them moving back towards a PTC attitude, let's start him going into his rate damping. I feel it's going to be a relatively long period of time to try and nail down the problem. Go ahead.
  • What Sy is saying is highly consequential. This is dramatized in the film for the sake of informing the audience. But the decision hasn't been made to irreversibly close the reactant valves and thus shut down the fuel cells yet.
562214
CAPCOM
He's asking how do we like his amperage setup right now?
562219
FLIGHT
Are you happy with his power level right now, EECOM?
562229
INCO
FLIGHT, INCO.
562230
FLIGHT
Go ahead.
562231
INCO
I'd like to firmly secure the high-gain before he starts getting into PTC.
562254
GNC
That's affirmative, FLIGHT.
562254
FLIGHT
GNC? What's firing now? You got something firing?
562259
GNC
Well, we've seen quite a bit of thruster activity.
562302
FLIGHT
Okay, I guess this kills the PTC, too, because we're not going to get into PTC as long as we've got something venting.
562312
GNC
Roger, FLIGHT. That agrees with what we're seeing here.
562315
EECOM
FLIGHT, EECOM.
562316
FLIGHT
Go, EECOM.
562317
EECOM
I've got a little correction. Let's put INVERTER 1 on both AC buses, please.
  • Earlier he asks for INVERTER 3. Only 1 and 3 could pull power off of MAIN A, and MAIN B is dead.
562321
FLIGHT
INVERTER 1 on both AC.
562322
EECOM
That's affirm, so I can get some AC BUS power back so I can have some insight into my AC BUS 2 telemetry, especially my cryos, maybe - the venting may be coming from that. And also, I think that the FUEL CELL 2 pumps are on AC 2, and this will take care of it without switching the pumps yet.
  • Presumably, he needed the pumps back on.
562344
FLIGHT
Say that again. You think your fuel cell pumps -
562347
EECOM
Yeah. FUEL CELL 2 pumps I think are on AC 2.
562350
FLIGHT
Okay, but according to the checklist, he should have powered - he should have turned those off, right? Now, he said he was down through BMAG number 2 is in WARM UP, so he's already gone through the fuel cell pump stuff.
562401
EECOM
Okay. Good enough.
562404
FLIGHT
Okay, so you want to configure INVERTER 1 on both AC buses.
562408
EECOM
That's affirm, FLIGHT.
562421
CAPCOM
FLIGHT, I didn't - I was listening to the spacecraft and I didn't pass up INVERTER 3 to MAIN A to AC 2, did you delete that?
562429
FLIGHT
No, we deleted that.
562431
CAPCOM
Alright.
562435
FLIGHT
You want to put INVERTER 1 on both AC BUSES. EECOM and CAPCOM, let's do it.
562440
CAPCOM
Okay.
562447
FLIGHT
EECOM, from FLIGHT.
562448
EECOM
FLIGHT, EECOM.
562449
FLIGHT
Monitor this bear when we switch again -
562450
EECOM
With you.
562500
FLIGHT
TELMU and CONTROL, from FLIGHT.
562503
TELMU
Go, FLIGHT.
562504
CONTROL
Go, FLIGHT.
562504
FLIGHT
Will you take a look at the prelaunch data and go through your systems and see if there's anything you've got that may have started venting here?
562509
CONTROL
Roger, FLIGHT.
562510
TELMU
We'll look.
562511
FLIGHT
Okay. And I want a report on that in about the next fifteen minutes. Quick look type stuff.
562515
CONTROL
Okay.
562517
FDO
FLIGHT, FDO.
562518
FLIGHT
Go, FDO.
562518
FDO
We're definitely seeing a vent in the data.
562520
FLIGHT
Okay.
562528
FLIGHT
Roger. We copy that, CAPCOM.
562537
EECOM
Fuel cell - FLIGHT, EECOM.
562538
FLIGHT
Go ahead.
562539
EECOM
FUEL CELL 2 PUMPS to AC 1.
562541
FLIGHT
You want FUEL CELL 2 PUMP to AC 1.
562544
EECOM
Affirmative.
562545
FLIGHT
CAPCOM, FUEL CELL 2 PUMP to AC 1.
562602
FLIGHT
EECOM, from FLIGHT.
562603
EECOM
FLIGHT, EECOM.
562603
FLIGHT
Have you got anybody getting a delog on this thing downstairs?
  • The beginnings of an effort to trace back the data through the accident and piece together what actually happened.
562609
FLIGHT
NETWORK, from FLIGHT.
562610
NETWORK
FLIGHT, NETWORK.
562611
FLIGHT
Bring me up another computer in the RTCC, will you?
562614
NETWORK
We got one machine on the RTCC and we got dual CPs downstairs.
562619
FLIGHT
Okay, I want another machine up in the RTCC and I want a bunch of guys capable of running delogs down there.
562624
NETWORK
Roger that.
562626
CAPCOM
FLIGHT, did you hear them say he's getting some rates? We want to know if he's firing any thrusters?
562632
FLIGHT
Roger. GNC, watch those thrusters, will you?
562635
GNC
GNC. Say again?
562636
FLIGHT
Have you got any thrusters firing?
562638
GNC
We're looking at that C-3 thruster, FLIGHT. It looks like it stays on most of the time.
562643
FLIGHT
Well, can we turn them all off and see if we've still got the rates or any build-up in rates?
562648
GNC
Well, the rates that we're seeing is opposite to the direction of that thruster, so if anything it's just trying to hold and not quite up to it.
  • In other words, the venting is pushing in the opposite direction to C-3's firing so they're fighting, but the venting is stronger and winning.
562654
FLIGHT
Okay, but -
562655
CAPCOM
He's been trying to counteract the rates with DIRECT. He's been getting a negative pitch and a negative roll.
562703
FLIGHT
Okay.
562707
CAPCOM
But he asked if we were getting some thruster firings that were not being made by him.
562712
FLIGHT
I'll tell you what, GNC can you get somebody in the back room to try to figure out what the equivalent ∆V is we're getting? So that we can see if we can backtrack to see if we can figure out what's venting.
  • An elegant physics solution, albeit one that would take some time to pull off. In space, absent any external forces and by basic three-laws Newtonian physics, locating single sources of acceleration is a simple matter of running the numbers through basic physics equations.
562730
FLIGHT
In other words, do - it would seem that we could equate that to effective thrust and an axis and then deduce what's venting.
  • A vector, in other words, like you remember from grade school.
562738
GNC
Roger, we'll give that a try, FLIGHT.
  • He sounds impressed.
562739
FLIGHT
Okay. And that might be of interest to the LM guys.
  • TELMU and CONTROL.
562742
CAPCOM
He also said it was coming past window number 1.
562745
FLIGHT
Roger, we got that.
562745
INCO
FLIGHT, INCO. Need OMNI Charlie.
562747
FLIGHT
OMNI Charlie, CAPCOM.
562751
FLIGHT
EECOM, from FLIGHT. What did - okay, we've got two good AC buses. What did all that tell you, now?
562759
EECOM
It tells me that - well, just give me about 2 more minutes, FLIGHT.
562804
FLIGHT
Okay. Take your time.
562848
FLIGHT
Roger. Concur, CAPCOM.
562854
TELMU
FLIGHT, TELMU. We copy.
562856
FLIGHT
Roger.
562857
FDO
FLIGHT, FDO.
562858
FLIGHT
Go, FDO.
562859
FDO
Two machines in the RTCC.
562900
FLIGHT
Okay.
563138
GNC
FLIGHT, GNC.
563139
FLIGHT
Go, GNC.
563140
GNC
We would like to turn thruster Alpha 3 on MAIN A and see that'll help control that pitch and at the same time we can turn off Charlie 3 because -
563147
FLIGHT
Okay. Get me some real-time plotting on how we're using RCS here, will you?
563151
GNC
Roger, FLIGHT. And in the pitch axis we really don't seem to be using any. And that's why we'd like to go to Alpha and see if that changes it any.
563158
FLIGHT
Okay, now what do you want again?
563200
GNC
Thruster Alpha 3 to MAIN A.
563206
FLIGHT
Alpha 3 to MAIN A.
563210
FLIGHT
CAPCOM, do you want to pass that up to the crew, please?
563218
FLIGHT
Give me a gross amount of RCS propellant consumed so far, GNC.
563225
GNC
Roger, FLIGHT. It'll take 30 seconds.
563226
FLIGHT
Okay.
563231
GNC
That's affirmative, FLIGHT. We're still below the limits.
563234
EECOM
Flight, EECOM.
563235
FLIGHT
Go, EECOM.
563237
EECOM
We've really got to get that battery off the line and power down some more. And we've got to get some MAIN B power back so we can build our pressure back up in O₂ TANK 1. It's down to 318psi.
  • Nominal O₂ pressure is around 900psi. Normally, an automated pressure sensing switch would activate a heater as the tank depleted to heat the O₂ and keep the pressure around that number. 100psi is a bit of a redline mark, at which point even at minimal load only about 2 hours of useful power could be expected.
563252
FLIGHT
BATTERY -
EECOM
With MAIN B down, we have no heaters in O₂ tanks.
  • Heaters could be used to increase the pressure even with less gas (good old PV=nRT). But EECOM thinks they are on the dead DC MAIN B bus.
563256
FLIGHT
Okay, what do you want to power down?
563258
EECOM
Well, where'd he say he got down to? BMAG 2 OFF? Not inclusive?
563303
FLIGHT
That's affirmative. BMAG 2 is in WARM UP.
563306
EECOM
I think we'll go ahead and turn that down - we still have the LM with us, right?
563310
FLIGHT
That's affirmative.
563311
EECOM
So - if we shut down the SCS we ought to be a little better off, perhaps. I think we ought to press on and go down through BMAG 2 OFF, and get those lights minimum.
563323
FLIGHT
Okay. How much you want to power down? Another 10 amps?
563326
EECOM
Let's get the BMAG off and get the lights down to a minimum. Let's go down two more steps.
563330
FLIGHT
Okay. CAPCOM, we want to power down a little bit more. Want to get the BMAG off and the lights minimum there.
563357
FLIGHT
Okay, Sy. Now, how long do you want to leave this battery online?
563403
EECOM
I want to try and get it off as quick as I can -
563404
FLIGHT
Okay.
EECOM
- but I need to get the power down.
  • The spacecraft is currently drawing too much power for the one healthy fuel cell to supply, so the battery is currently required.
563407
EECOM
The crew did report they removed FUEL CELL 3 - they open-circuited it also, didn't they?
  • Here's that last-minute change FLIGHT requested earlier that EECOM missed.
563413
FLIGHT
I don't believe so.
563414
EECOM
FUEL CELL 1 and FUEL CELL 3 should be open-circuited.
563417
CAPCOM
We just had our last call for FUEL CELL 1 open-circuit, and we left FUEL CELL 3 as it was.
563423
EECOM
Let's take this open-circuit, FUEL CELL 3.
563424
FLIGHT
Open-circuit FUEL CELL 3.
563426
EECOM
Get it off the bus.
563429
GNC
FLIGHT, GNC.
563432
FLIGHT
Calling, FLIGHT. Say again?
563434
GNC
This is GNC, FLIGHT.
563435
FLIGHT
Go ahead.
563435
GNC
Yeah, we've used a total of about 70 pounds RCS. We'd like to change the jet configurations, see if that'll help us out any.
563445
FLIGHT
Okay, what do you want to try now?
563447
GNC
We'd like to turn the Bravo jets all to be OFF, and all Delta to MAIN A.
563455
FLIGHT
Turn all Bravo OFF, and Delta to MAIN A, right?
563458
GNC
Roger. That will verify that it isn't a Bravo thruster that's causing the problem with attitudes.
563504
FLIGHT
Okay. CAPCOM, we'd like to turn all Bravo jets OFF and all Delta jets to MAIN A.
563514
CAPCOM
Roger.
563516
EECOM
FLIGHT, EECOM.
563517
FLIGHT
Go, EECOM.
563517
EECOM
Let's take BATTERY A off the MAIN.
563520
FLIGHT
We can support the -
563522
EECOM
That's affirm.
FLIGHT
- MAIN now on the one fuel cell even with the cryo O₂ going down?
563526
EECOM
That's affirm, FLIGHT.
563528
FLIGHT
Okay. What's your worry level on cryo O₂?
563532
EECOM
Say again, FLIGHT?
563534
FLIGHT
Okay. You want to -
563535
EECOM
I want to save the battery, FLIGHT.
563537
FLIGHT
Okay. Let's see, what battery have we got online, Sy?
563541
EECOM
Say again?
563541
FLIGHT
What battery have we got online?
563543
EECOM
BATTERY Alpha, FLIGHT.
563544
FLIGHT
BATTERY A, okay.
563545
EECOM
And next step, of course, we'll then think - we've got to worry about getting some power on MAIN B to get the pressure back up in O₂ TANK 1.
563551
FLIGHT
Roger. Turn BATTERY A OFF, CAPCOM.
563615
EECOM
FLIGHT, EECOM.
563616
FLIGHT
Go, EECOM.
563617
EECOM
Let's have them isolate the surge tank also, and save it. We'll use the cryo as much as we can.
  • The surge tank provided additional O₂, and was located in the Command Module, so it stayed with the crew for the whole flight.
563623
FLIGHT
Say that again?
563625
EECOM
Let's isolate the surge tanks -
563626
FLIGHT
Why that?
EECOM
- in the Command Module.
563628
FLIGHT
I don't understand that, Sy.
563629
EECOM
I don't want to - I want to use the cryo as much as possible.
563632
FLIGHT
But that would seem to be the opposite, if you want to keep the fuel cell going.
563636
EECOM
The fuel cells are fed off the tanks in the Service Module, FLIGHT. The surge tank is in the Command Module. We want to save the surge tank and use it for re-entry.
  • You can find a detailed diagram of the O₂ system, including the Surge Tank, here.
563646
FLIGHT
Okay, I'm with you. I'm with you.
563649
EECOM
Roger.
563650
FLIGHT
CAPCOM, let's also isolate the surge tank.
563657
CAPCOM
Okay, you want to isolate the surge tank.
563700
FLIGHT
Yeah.
563701
CAPCOM
O₂ surge tank, right?
563701
FLIGHT
Yeah. What we're really doing is securing our entry systems right now.
563729
FLIGHT
Yeah, we're trying to figure out some way to get power on BUS B.
  • Recall that the tank heaters, which are needed to raise the pressure, are thought to be on BUS B, which is currently dead.
563759
FLIGHT
EECOM, from FLIGHT.
563810
FLIGHT
EECOM, from FLIGHT.
563811
EECOM
FLIGHT, EECOM.
563812
FLIGHT
Did you consider putting a battery on BUS B long enough to get the pressure up?
563816
EECOM
Well, I'm trying - I want to determine whether or not the - the 5 amps is going to hurt us any. That's going to be on MAIN A, incidentally. I made a mistake. O₂ TANK 1 HEATERS are on MAIN A.
  • Good news, since MAIN B appears to be shot.
563828
FLIGHT
Well, we've got MAIN A with us, haven't we?
563846
EECOM
FLIGHT, EECOM.
563847
FLIGHT
Go, EECOM.
563847
EECOM
Okay. Since O₂ TANK 1 HEATERS are on MAIN A, and we've got them off now, we'll be able to stand the 5 amps temporarily for manual pressurization. Let's have them turn the heaters on manually in O₂ TANK 1.
  • As noted previously, the heaters are normally controlled automatically off a pressure sensor. That automated switching highlights the simplicity of the spacecraft's systems; no computers needed to monitor and react to the sensor: it just plugged right into the activation circuit.
563903
FLIGHT
O₂ -
563903
EECOM
And we'll watch the pressure.
FLIGHT
- TANK 1.
563914
EECOM
That's CRYOGENIC O₂ HEATER 1, FLIGHT.
563917
GNC
FLIGHT, we copy that. No problem.
563919
FLIGHT
No problem, CAPCOM.
563922
FLIGHT
CAPCOM, we want to get CRYO O₂ TANK number 1 HEATER ON.
563945
FLIGHT
You can stand the 5 amps on MAIN A?
563947
EECOM
That's affirm. We think so, FLIGHT.
564007
FLIGHT
Did you see your 5 amp increase in current there, EECOM?
564013
EECOM
That's affirm, FLIGHT.
564014
FLIGHT
Okay.
564014
EECOM
26.7 volts, looks good -
564017
FLIGHT
Okay.
EECOM
- we'll watch the pressure.
564018
EECOM
FLIGHT, to be consistent we ought to isolate the REPRESS package also.
  • The repressurization package, like the O₂ surge tank, was a reserve of pressurized oxygen gas in the Command Module.
564024
FLIGHT
Okay, you want to isolate REPRESS pack.
564040
FLIGHT
AFD, from FLIGHT.
564043
AFD
Go ahead, FLIGHT.
564043
FLIGHT
Get one of your guys full-time in the back room keeping track of the spacecraft configuration as we pass it up to the crew. You might use Larry. Why don't you stay on, get Larry in the back room to keep track of configuration stuff we give to the crew?
564055
AFD
Okay, FLIGHT.
564056
FLIGHT
Okay?
564057
AFD
And we've got the voice recorder and we're starting to transcribe that.
564101
FLIGHT
Okay, now has anybody started the delog of the initial problem? You've got a delog going? Have you got people that are going to be in a position to evaluate it?
564112
FLIGHT
Okay.
564122
FLIGHT
TELMU and CONTROL, from FLIGHT.
564125
CONTROL
Go, FLIGHT.
564126
FLIGHT
Roger. I want LM manning around the clock.
564129
CONTROL
Roger.
564130
EECOM
FLIGHT, EECOM.
564131
FLIGHT
Go ahead, EECOM.
564132
EECOM
I want the fans on in O₂ tank 1, we're not seeing a pressure increase. We can stand it.
564138
FLIGHT
You can stand it?
564140
EECOM
That's affirm.
564141
FLIGHT
Fans on in TANK 1, right?
564144
EECOM
Affirmative, FLIGHT.
564146
FLIGHT
CAPCOM, do you want to bring the fans on in TANK 1?
564148
EECOM
It's just 1 amp, FLIGHT.
564150
FLIGHT
Okay.
564152
EECOM
Okay, he's got an MC&W for - varied reasons.
564220
GNC
FLIGHT, GNC.
564222
FLIGHT
Go ahead, GNC.
564223
GNC
It looks like the vehicle has stabilized considerably over the last few minutes.
564228
FLIGHT
Okay. That could mean one of two things. Either whatever was venting has stopped venting, it's empty; or do you feel it could also be associated with the thruster Quad Bravo we just isolated?
564241
GNC
It's possible, FLIGHT. We really don't know yet, though.
564245
FLIGHT
Okay. Are we essentially in a - can you figure out what orientation we are from a standpoint of thermal control? Assume - what's our rate right now?
  • He's referring to the heat and shadow of the Sun.
564255
GNC
Right now he has a -0.10 of a degree in pitch. And yaw and roll are very close to 0.
564301
FLIGHT
Okay.
564302
EECOM
FLIGHT, EECOM.
564303
FLIGHT
Go ahead, EECOM.
564304
EECOM
The pressure in O₂ TANK 1 is all the way down to 297, we'd better think about getting in the LM, or using the LM systems. I'm going to have to power way down; I don't know if I'm going to be able to save the O₂ for the third fuel cell - for FUEL CELL 2, rather.
  • PSI. At 56:32:37 it was reported at 312psi.
564319
FLIGHT
The heaters aren't working, now let's start thinking circuit breakers. You got any circuit breakers you want to check, there?
  • In other words, FLIGHT is wondering if the heater circuit breaker popped, so despite flipping the switch on, the heaters weren't actually running.
564327
EECOM
We saw the current, FLIGHT.
  • EECOM doesn't think the circuit breaker theory is likely, since he saw the load on MAIN A increase by the expected amount for a heater to be running.
564328
FLIGHT
You saw the current - okay, look -
564332
EECOM
Let's check it anyway, FLIGHT, you're right.
  • But that could be a coincidence or something else could be wrong, so he comes around.
564333
FLIGHT
It looks like it's cycling up a PCM count from 297 to 302. Give me some circuit breakers to check.
  • The telemetry refreshed and the pressure increased - by a hair.
564339
EECOM
Okay, panel 226. CRYOGENIC O₂ HEATER 1, MAIN A circuit breaker.
564349
FLIGHT
I'm sorry, I didn't catch you there. CRYO O₂ TANK 1? Panel 226?
564353
EECOM
CYRO O₂ HEATER 1, MAIN A, panel 226.
564357
FLIGHT
Roger.
564358
EECOM
Also, FLIGHT, let's check the FAN MOTOR circuit breakers TANK 1, on panel 226 also.
564408
FLIGHT
FAN MOTOR.
564410
EECOM
CRYO FAN MOTORS TANK 1. There are three circuit breakers - three phase.
  • Three-phase alternating current. Motors are easier built on three-phase AC. Unlike the two-phase AC your house gets, three-phase AC works with three wires.
564418
FLIGHT
Get that, CAPCOM?
564420
CAPCOM
I've got the 226 CRYO O₂ HEATER 1 MAIN A, and CRYO FAN MOTORS TANK 1, three of them on -
564427
FLIGHT
That's right. All three phases.
564431
FLIGHT
EECOM, I don't think we're going to come to any solution here until we get back to the initial set of conditions, so I hope you got a set of guys looking at the delog pretty soon.
564450
FLIGHT
TELMU, from FLIGHT.
564452
TELMU
Go ahead, FLIGHT.
564452
FLIGHT
I want you to get some guys figuring out minimum power in the LM to sustain life.
  • The first mention of this critical problem and need on the loop, but it's nearly certain that the back rooms were working on this already.
564457
TELMU
Roger.
564458
FLIGHT
Okay.
564517
CAPCOM
We got the circuit breakers. All in, FLIGHT.
  • The circuit breakers popped out when broken and pushed in when the circuit was closed.
564522
FLIGHT
Roger. Copy, all circuit breakers in.
564615
EECOM
FLIGHT, EECOM.
564615
FLIGHT
Go ahead, EECOM.
564616
EECOM
Don't we have both BMAGs OFF?
564626
FLIGHT
CAPCOM, would you verify that both BMAGs are OFF, please?
564640
FLIGHT
You want to bring it off, right EECOM?
564643
EECOM
Affirmative, FLIGHT.
564644
FLIGHT
CAPCOM, let's get it off.
564732
FLIGHT
CAPCOM, from FLIGHT.
564734
CAPCOM
Go, FLIGHT.
564735
FLIGHT
Will you get a cockpit panel 1, 2 layout and have the crew - just get the thing and have the crew read across all instruments, all gauges, and write down exactly what they read in those things?
  • Panel 3 contained fuel cell readings, which were already being closely monitored, and propellant readings for the SPS, which FLIGHT did not want to use. So there was no need for a survey.
564748
CAPCOM
Okay. You want a survey of panels 1 and 2 on gauges?
564753
FLIGHT
Yeah.
564754
CAPCOM
Okay. And talkbacks, huh?
564757
FLIGHT
That's affirmative. Figure out some code that you can use and - I think that's something we should have gotten started a while ago.
564810
FDO
FLIGHT, FDO.
564821
FLIGHT
See that juice is still going down there, EECOM. You got any more suggestions?
564828
EECOM
FLIGHT, EECOM.
564829
FLIGHT
Any more suggestions in trying to pump up O₂ TANK 1 pressure?
564832
EECOM
No. FLIGHT, we're gonna hit 100psi in 1 hour and 54 minutes. That's the end, right there.
564847
FLIGHT
Okay, 100psi -
564849
EECOM
Less than 2 hours, now.
565056
FLIGHT
FDO, from FLIGHT.
565057
FDO
Go ahead, FLIGHT.
565058
FLIGHT
Whatever planning you do, I want to do assuming that we're going around the Moon and we're using the LM for performing maneuvers, because in the present configuration, unless we get a heckuva lot smarter I think we're wasting our time planning and using the SPS.
565113
FDO
Okay, FLIGHT.
565114
FLIGHT
So I think all of our return-to-Earth type planning should be assuming the use of the LM DPS and/or RCS. And I think third priority down the line should be CSM RCS.
565127
FDO
Okay, and I'm assuming that you want fast-as-possible return.
565132
FLIGHT
Yeah, I think that's the case.
565134
FDO
Okay. We'll work on it from that sideline, FLIGHT -
565136
FLIGHT
Okay.
FDO
Should be no problem.
565138
GUIDO
I copy that, FLIGHT.
565146
EECOM
FLIGHT, EECOM.
565148
FLIGHT
Go ahead, EECOM.
565149
EECOM
Okay, listen. There is a possibility that we blew a O₂ line in one of the fuel cells, and it's effectively manifolded there, of course. Now, I'm - I want to shut off one of the reactant valves to one of the fuel cells. And that would be FUEL CELL 3, since its O₂ pressure is gone. Now, FUEL CELL 1's O₂ pressure is trying to stay up there, at 45psi. Maybe the problem is in FUEL CELL 3.
  • In other words, both tanks run into this line.
565224
FLIGHT
That sounds like a good assumption, right there.
565226
EECOM
Yeah. FUEL CELL 3 is lost anyways, FLIGHT.
565229
GNC
FLIGHT, GNC.
565230
FLIGHT
Go ahead, GNC.
565231
GNC
Turn Charlie 1 thruster OFF.
565234
FLIGHT
You want to turn Charlie 1 OFF? Why?
565236
GNC
Well, looks like we're getting a lot of firing out for no reason.
565241
FLIGHT
Okay, CAPCOM, recommend THRUSTER C-1 to OFF.
565256
CAPCOM
Say again, FLIGHT?
565257
FLIGHT
THRUSTER C-1 to OFF.
565300
CAPCOM
C-1 and -2 OFF.
565301
FLIGHT
No. C-1. OFF. I added a word in there. Turn THRUSTER C-1 OFF.
565325
FLIGHT
EECOM, from FLIGHT.
565326
EECOM
FLIGHT, EECOM.
565327
FLIGHT
Why don't you show me where you think that problem is?
565329
EECOM
Okay. Clint's coming up.
565516
EECOM
FLIGHT, EECOM.
565523
FLIGHT
Go ahead, EECOM.
  • This is actually Glynn Lunney responding, who was preparing for his shift. He spent some time before his team came on circulating the consoles and issuing a single critical question to each that had to be answered in the following half hour.
565524
EECOM
We need to get the - make sure the inline heaters for FUEL CELLS 1 and 3 are OFF.
565550
FLIGHT
EECOM, from FLIGHT.
565551
EECOM
FLIGHT.
565552
FLIGHT
You want to shut off both reactant valves to FUEL CELL number 3?
565554
EECOM
It's dead anyway, FLIGHT.
565556
FLIGHT
Okay.
565556
EECOM
And the inline heaters OFF in FUEL CELLS 1 and 3, please.
565600
FLIGHT
What we're proposing here - supposing here, CAPCOM, is we may have a - had some problem in FUEL CELL number 3 since that's the one that's reading no O₂ right now. And we may be losing our O₂ through FUEL CELL number 3, the O₂ manifold - inasmuch as they're manifolded together commonly. Looks like the O₂ in FUEL CELL 1 and 2 seem to be trying to stay up there. And FUEL CELL 3 looks like it's the oddball here.
565643
FLIGHT
CAPCOM, let's close the REACTANT VALVE to FUEL CELL number 3.
565649
CAPCOM
Okay, close REACTANT VALVE to FUEL CELL number 3.
565653
CAPCOM
And you're saying that 1 and 2 look okay?
565657
FLIGHT
Well, what it looks like - looks like the pressure's trying to stay up there and this is the best guess we've got right now because we've got to stop this O₂ flow.
565704
CAPCOM
Okay.
565713
GNC
FLIGHT, GNC.
565714
FLIGHT
GO, GNC.
565715
GNC
Some more jet reconfigurations to see if we can hold the attitude.
565718
FLIGHT
Okay.
565719
GNC
We'd like to turn Charlie 2 OFF -
565720
FLIGHT
Wait, why are we interested in holding attitude? If we're not venting why not drift for a while? That would probably be better from a standpoint of thermal control anyway, wouldn't it?
565728
GNC
I'd think we'd like to get into a controlled drift rather than just some random thing, FLIGHT.
565734
FLIGHT
Standby.
565755
FLIGHT
Do you want them to go through that whole smash for fuel cell shutdown, Sy? I assume you do - heaters and all?
565801
FLIGHT
EECOM?
565803
EECOM
That's affirm, FLIGHT. He's gone through much of it already, got the pumps off.
565806
FLIGHT
Okay. You want them to go through the whole fuel cell shutdown. Heaters and all.
565810
EECOM
Heaters, reactant valves, and the pumps of course he's already done.
565813
FLIGHT
Okay. Have them go ahead, CAPCOM.
565815
EECOM
And get the inline heaters OFF on FUEL CELL 1 also, FLIGHT.
565819
FLIGHT
Inline heaters OFF on FUEL CELL 1.
565821
EECOM
Roger, it'll cut the current requirement down, anyway.
565855
CAPCOM
The COMM holding up? Sounds like he's going out.
565858
FLIGHT
How you doing there, INCO? From a standpoint of OMNI-switching?
565902
INCO
We might be a little better on Bravo.
565904
FLIGHT
Okay. Can you figure me out some way to keep communications and yet cut down a bit on the load? You might talk to EECOM on it.
565911
INCO
Okay. We can turn the tape recorder OFF.
565914
FLIGHT
EECOM, from FLIGHT.
565915
EECOM
FLIGHT, EECOM.
565916
FLIGHT
You don't need the tape recorder, do you?
565917
EECOM
Heck, no. Get it off.
565918
FLIGHT
Let's get it off.
565921
INCO
It may be already off, but that's one thing we don't need.
565924
EECOM
Let's go down the list as much of that INCO stuff as we can get, FLIGHT. I think that's about the one biggie right there.
565930
INCO
Is that the only thing we can give up? We turn the POWER AMPL OFF, we won't get HIGH BIT RATE.
565935
FLIGHT
CAPCOM, from FLIGHT.
565936
CAPCOM
Go.
565937
FLIGHT
Let's also verify tape recorders OFF, please.
565940
CAPCOM
Okay, I think we -
565942
FLIGHT
I don't think we got down that far on the list, did we? We went through the BMAGs and that was lights - BMAGs and lights, and I think we stopped right there.
565949
CAPCOM
Yeah.
565950
EECOM
Yeah, that's affirm, FLIGHT. Tape record - we'll skip a step and go tape recorder OFF.
570012
RECOVERY
AFD, meet RECOVERY. RECOVERY loop.
570018
FLIGHT
What was that, CAPCOM?
570022
GUIDO
We copy, FLIGHT.
570023
FLIGHT
What was that, GUIDANCE?
570025
GUIDO
He had an 06 18 he couldn't get rid of; he's got rid of it now.
570104
FDO
FLIGHT, FDO.
570118
CAPCOM
Okay, FLIGHT. I had them reading off a lot of gauge readings, and we got over to FUEL CELL 3. And I hope your people were copying all this down.
570127
FLIGHT
Did you get some kind of master? We got it on tape, I'm sure we can get it off the tape.
570132
CAPCOM
Alright. That's affirm. I'd say I have 95% of the ones he read.
570135
FLIGHT
Okay.
570218
FDO
FLIGHT, FDO.
570219
FLIGHT
Go, FDO.
570220
FDO
When the systems men can stand it, I need two minutes for a checkpoint to save all this data.
570226
FLIGHT
I don't see why we couldn't - EECOM, GNC, can you stand a checkpoint right now?
570236
EECOM
It only takes a minute, I guess I'll have to if we need it, FLIGHT.
570238
GNC
Go ahead, FLIGHT.
570239
FLIGHT
Yeah, I think it'd be good to get a checkpoint. Go ahead.
570241
FLIGHT
EECOM, have you deduced anything - have you seen your REACTANT VALVES go off? You seen flow cease?
570251
EECOM
Can't tell, FLIGHT.
570252
FLIGHT
Yeah.
570252
EECOM
They were open-circuited, and the pressure - still appears to be going down.
570259
FLIGHT
Yup.
570327
FDO
Negative, FLIGHT.
570337
EECOM
FLIGHT, EECOM.
570338
FLIGHT
Go, EECOM.
570339
EECOM
We'd better confirm that the FUEL CELL 3 REACTANT VALVE circuit breaker on panel 226 was closed when he shut those.
570347
FLIGHT
FUEL CELL 3 REACTANT circuit breaker on what panel?
570351
EECOM
226.
570354
EECOM
They're normally open.
  • To avoid accidental shutoff of the reactant valves, the electrically activated shutoff valves were normally open-circuited and had to be closed in order for the shutoff switch to actually do anything.
570358
FLIGHT
Okay, good idea.
570400
CAPCOM
You want them - close the circuit breaker -
570402
FLIGHT
Yeah.
CAPCOM
- on the valve, and then -
570403
FLIGHT
Yeah.
570405
EECOM
Yeah, FLIGHT; he should have gotten a barber pole on that.
570417
FLIGHT
Yeah, wouldn't he get a barber pole when he turned the reactants off? EECOM?
570422
EECOM
Affirm, FLIGHT.
570424
FLIGHT
Even with the circuit breaker open?
570426
EECOM
No -
570426
FLIGHT
No. Okay, so he ought to know that. We can just verify that he got a -
  • The rest of the sentence here would have been "barber pole."
570435
FDO
Okay, FLIGHT. We have our checkpoint.
570437
FLIGHT
Okay. All flight controllers, I'd suggest you start handing over, because I think a fresh team's probably going to be thinking clearer. I think the rest of us can continue working in some other function in support of the new team coming on.
570449
GNC
Go on thruster A-4, FLIGHT.
570451
FLIGHT
Okay. Go on thruster A-4, CAPCOM.
570452
INCO
OMNI Charlie, FLIGHT.
570453
FLIGHT
Roger. And OMNI Charlie.
570613
FLIGHT
Okay. All flight controllers, I'm handing over to Glynn. I assume the majority of all the team guys are pretty much briefed and up to speed as best we can. Now what I'd suggest is the white team do two things: they go over the delogs - okay - let me go back over this again. We're handing over to Glynn. I'd suggest the white team goes back and starts going through the delog of the data. In other words, let's see if we can go back to the initial conditions and work on that problem to see if we can find out what happened and we may find some better clues as to what to do and let the fresh guys come on and try to figure out where do we go from here.
  • Kranz's team was the white team. Glynn headed up black team.
570653
FLIGHT
And the delog is in way now. Roger.
570714
FLIGHT
Okay, EECOM. Tell me about the latch. Do you think you've got the reactants latched?
  • FLIGHT is following up on the possibility that the reactant valve didn't close. There was, in addition to the breaker, a latch that could wedge it open to prevent it from closing in case of heavy vibration, as could happen during a burn.
570720
EECOM
FLIGHT, EECOM.
570721
FLIGHT
Go.
570722
EECOM
The crew reported he got barber pole whenever he threw the reactant switch, so that implies that he did all the right things and he really got it shut off. And it looks like that didn't help us any - the pressure's not improving any.
570737
FLIGHT
Okay, now the next question is: are you willing to do that on FUEL CELL number 1?
570742
EECOM
That's the question we're pondering, FLIGHT. We've got to come up with an answer on that one.
570747
FLIGHT
Soon. FUEL CELL 2 is working okay.
570749
EECOM
That's affirmative.
570751
FLIGHT
Unless we do something to get that oxygen, it's not going to do us any good to save fuel cells.
  • In other words, there's no reason to be reluctant to shut off another fuel cell if there won't be any oxygen to feed into the working one anyway. You can already see how much more Lunney opines on debates.
570756
EECOM
That's affirmative.
570757
FLIGHT
Okay - okay. GNC, FLIGHT.
570801
GNC
GNC.
570802
FLIGHT
You stabilized now? - standby.
570806
FLIGHT
Here comes configuration, I think it's yours.
570834
FLIGHT
I didn't copy all those; did you, GNC?
570836
GNC
Roger, FLIGHT. We concur.
570838
FLIGHT
Is that good? How are the rates?
570841
CAPCOM
You copy those, GNC?
570842
GNC
It's holding down around a tenth of a degree per second, FLIGHT. Oscillating, he's in ACCEL CMD, so -
570850
FLIGHT
ACCEL CMD?
570851
GNC
Right.
570853
FLIGHT
Alright.
570857
CAPCOM
FLIGHT, did you copy all those thrusters?
570859
FLIGHT
Go ahead. Who's calling?
570902
CAPCOM
CAPCOM. Did you copy all those -
570903
FLIGHT
I didn't copy them all, Jack. GNC, did you copy them all?
570906
GNC
That's affirmative, FLIGHT.
570907
FLIGHT
Do you like that configuration for right now?
570909
GNC
Yes.
570910
FLIGHT
As best you can tell - best you can tell, the rates are okay. And he's flying ACCEL CMD.
570919
GNC
Roger, FLIGHT.
570920
FLIGHT
No rate damping, then, right?
570922
GNC
Roger.
570924
FLIGHT
Are both BMAG packages off?
570927
GNC
Yes, they are.
570929
FLIGHT
Okay.
570945
FLIGHT
Standby. EECOM, you need anything?
570951
EECOM
Roger, FLIGHT. We'll take those.
570953
CAPCOM
We want those?
570955
EECOM
Roger.
570957
FLIGHT
What do you want?
570959
EECOM
Get him to go through the meters -
571000
FLIGHT
Okay.
EECOM
- on FUEL CELL 1 and 3.
571002
FLIGHT
Okay. Just FUEL CELL 1 and 3, Jack.
571125
FLIGHT
EECOM, I don't like the way that O₂ pressure's going down. If you want to do something about these other reactant valves, let's make up our mind.
571131
EECOM
Okay.
571132
FLIGHT
Don't you think?
571132
EECOM
Let me get that for you in a minute, FLIGHT. Let's standby on these readouts.
571136
FLIGHT
Yeah, okay. Anybody can copy the readouts. Be sure you're discussing these reactants.
571154
CAPCOM
Hey, FLIGHT. CAPCOM. Long time ago I heard someone mention something about closing the REPRESS package and then we never made a decision on that. Do you want to do that, too?
571203
FLIGHT
EECOM? - he's busy.
571206
EECOM
Go, FLIGHT.
571207
FLIGHT
Do you want to close out the REPRESS pack? I think that came on for them before.
571212
EECOM
We indicated earlier that we'd like to get it closed off -
571214
FLIGHT
Yes, Jack.
571223
EECOM
FLIGHT, EECOM.
571224
FLIGHT
Go ahead.
571225
EECOM
Okay, on the reactants for FUEL CELL 1. Seems to me we have no choice but to go ahead and do it. The pressure continues to drop. We're not going to have anything left soon anyway. So, looks like the next best thing to try is to go ahead and turn the reactants OFF on FUEL CELL 1.
571243
FLIGHT
Yeah. What is this pounds on your display, Clint?
571247
EECOM
On O₂?
571248
FLIGHT
Yup.
571249
EECOM
That's - that's invalid.
571251
FLIGHT
Okay.
571257
EECOM
And of course, you'll want to make sure that his circuit breaker is closed for FUEL CELL 1 when he starts to close the reactant valves.
571304
FLIGHT
Which circuit breaker is that? The one on 226?
571306
EECOM
Roger.
571310
FLIGHT
That's FUEL CELL number 1.
571312
EECOM
That's right, FUEL CELL reactants number 1.
571314
FLIGHT
Alright.
571316
FLIGHT
Is he done with that readout yet?
571320
EECOM
I didn't copy the last part of it there, FLIGHT -
571332
FLIGHT
EECOM, FLIGHT.
571334
EECOM
Go, FLIGHT.
571334
FLIGHT
Is there any chance that I'm just looking at a bad pressure reading here? I'm going to shut off the second fuel cell now, is there any data you can correlate that says that yeah, that pressure is going down?
571345
EECOM
On the O₂ tank?
571346
FLIGHT
Yes.
571352
FLIGHT
You understand my question?
571352
EECOM
I understand your question. The temperatures are also dropping. Let me get a verification on that - standby just a minute.
  • The ideal gas law PV=nRT can help verify the two readings against each other.
571400
FLIGHT
Alright.
571415
FLIGHT
Yeah, we copy that. Tell them we're debating shutting off the reactants on 1.
571419
EECOM
FLIGHT, EECOM.
571419
FLIGHT
Go ahead.
571420
EECOM
The temperature is the only thing we have.
571422
FLIGHT
And does it correlate?
571423
EECOM
Pretty closely.
571424
FLIGHT
You're saying that I'm looking at a valid pressure in that tank, and it's still going down.
571428
EECOM
That's the way it looks, FLIGHT.
571429
FLIGHT
Therefore?
571430
EECOM
Therefore we need to go to FUEL CELL 1 and turn off the reactants.
571434
FLIGHT
CAPCOM, FUEL CELL 1 reactants. Circuit breaker and a switch.
571438
CAPCOM
Okay - you want them to go through the fuel cell shutdown procedure on 1?
571442
FLIGHT
EECOM?
571443
EECOM
Say again, FLIGHT?
571443
FLIGHT
Do you want them to go through the fuel cell shutdown procedure on 1?
571447
EECOM
That's affirmative.
571448
FLIGHT
Yes, Jack.
571450
CAPCOM
Because -
571451
FLIGHT
Because the tank 1 is still going down. Pressure and temp - pressure going down, temperature confirms it.
571457
CAPCOM
Okay.
571505
FLIGHT
EECOM, FLIGHT.
571506
EECOM
Go ahead, FLIGHT.
571507
FLIGHT
Of course, you want to ask yourself if you want to open 3.
  • Open-circuit FUEL CELL 3, perhaps?
571513
EECOM
Open 3?
571514
FLIGHT
Yeah. You don't want to do that?
571516
EECOM
Negative, let's leave 3 like it is.
571526
GNC
FLIGHT, GNC.
571528
FLIGHT
Standby.
571531
FLIGHT
What MAIN BUS do you want up?
571533
EECOM
MAIN A.
571534
FLIGHT
Just like we -
571534
EECOM
Just like it is.
571535
FLIGHT
Just like it is. FUEL CELL 2's on MAIN A.
571539
EECOM
That's affirm.
571541
INCO
FLIGHT, INCO.
571541
FLIGHT
Go.
571542
INCO
OMNI Bravo.
571545
FLIGHT
OMNI Bravo, too, Jack.
571601
FLIGHT
EECOM, FLIGHT.
571603
EECOM
Go ahead, FLIGHT.
571604
FLIGHT
How long can I leave that stuff off and still turn it back on? Any time at all?
571608
EECOM
Negative, FLIGHT. It's like it wipes it out.
  • As dramatized in the film, once the fuel cells are shut off they're done for good.
571611
FLIGHT
Alright.
571620
FLIGHT
EECOM, FLIGHT.
571623
FLIGHT
I don't know. That's what I'm asking, but we've got that shut off now.
571631
FLIGHT
Okay. When you can.
571707
EECOM
That's right, FLIGHT.
571708
FLIGHT
You're ready for that now. Sure, absolutely, huh EECOM?
571711
EECOM
That's it, FLIGHT.
571712
FLIGHT
It's still going down and it's not possible that thing is sort of bottoming out, is it?
571717
EECOM
Well, the rate is slower but we have a little less pressure too, so we would expect it to be a little bit slower.
571723
FLIGHT
You are sure, then; you want to close it.
571726
EECOM
Seems to me we have no choice, FLIGHT.
571731
FLIGHT
Well.
571733
EECOM
Standby one minute; I'll poll my back room.
571735
FLIGHT
It went down again. One more.
571750
EECOM
We're go on that, FLIGHT.
571752
FLIGHT
Okay. That's your best judgement; we think we ought to close that off, huh?
571755
EECOM
That's affirmative.
571756
FLIGHT
It's dropping down to 234. Yeah. Okay. FUEL CELL number 1 REACTANTS coming OFF.
  • psi.
571820
GNC
FLIGHT, GNC.
571821
FLIGHT
Go ahead.
571822
GNC
I think we can help the CMP a bit if we can tell them to enable B/D ROLL in the DAP. He's got A/C turned OFF and he's got A/C selected in the DAP. Can we tell him to -
  • To instruct the DAP that it was allowed to use RCS packages B and D for roll control.
  • The A/C ROLL thrusters were disabled entirely, but the DAP was being asked to use them for roll control.
571831
FLIGHT
Is he under DAP control?
571832
GNC
Well, he goes to it occasionally -
571834
FLIGHT
Okay.
GNC
- he's in - RATE CMD right - ACCEL CMD right now, but -
571836
FLIGHT
Okay. Okay. He's got A/C off, huh?
571840
GNC
Right.
571841
FLIGHT
CAPCOM, when you get a spare minute there, Jack needs to enable B/D ROLL in the DAP if he wants to use it.
571847
FLIGHT
If he wants to use the DAP, that is.
571855
FLIGHT
Jeez, it's really going down.
571918
EECOM
FLIGHT, EECOM.
571918
FLIGHT
Go.
571919
EECOM
Okay, is the - LM gotten all set up for using LM systems for supporting the CSM?
571926
TELMU
That's affirmative.
571927
FLIGHT
Yes.
571928
EECOM
Okay. We'll get you time as to what it looks like we'll have for power here, shortly.
571933
FLIGHT
TELMU and CONTROL, FLIGHT.
571935
CONTROL
CONTROL here.
571937
FLIGHT
Keep reminding me of that heater; now I don't want to let that thing go too long.
571940
CONTROL
Okay. We're still trying to get some data - substantiating data on that, FLIGHT. My own personal opinion is the sooner we can take care of that, the better off I'm going to feel about it.
571949
FLIGHT
Yeah, okay, Hal. Go get 'em.
571951
TELMU
Okay; and FLIGHT, TELMU. We're working on a procedure right now that powers the LM internally from its own power.
571957
FLIGHT
Yes. Fine.
571958
INCO
FLIGHT, INCO.
571959
FLIGHT
Go.
571959
INCO
Save you a little more power to turn the HIGH GAIN antenna switch to OFF.
572003
FLIGHT
HIGH GAIN antenna OFF?
572005
INCO
POWER switch OFF.
572006
FLIGHT
POWER switch. You're doing okay on the OMNIs, huh?
572009
INCO
Yes. We've got the 210s.
572011
FLIGHT
Okay. CAPCOM, he can turn the HIGH GAIN antenna POWER switch OFF; we're doing fine on the OMNIs. We've got the big dish.
572017
EECOM
FLIGHT, EECOM.
572017
FLIGHT
Go.
572018
EECOM
Let's charge BATTERY A.
572019
FLIGHT
Yeah, I was wondering about that. Do you - let me get the HIGH GAIN POWER off first, okay? Clint?
572025
EECOM
Okay.
572033
FLIGHT
How much - how many amps will that give us, EECOM?
572035
EECOM
About 1.3, 1.4 amps - - amp-hours per hour. The cost is about 4.5 amps.
  • The rate of battery charge.
572043
FLIGHT
So it's no big deal on the amps.
572044
EECOM
That's right. And we'd like to use whatever time we have to put energy back into the battery.
572050
FLIGHT
Yeah, and I see O₂ tank 1 pressure is 217.
572053
EECOM
That's affirmative. It's still coming down.
572055
FLIGHT
CAPCOM, FLIGHT.
572057
CAPCOM
Go, FLIGHT - standby.
572108
FLIGHT
GUIDANCE, you want anything done with the CMC right now?
572111
GUIDO
FLIGHT, we would like a VERB 74 before they power it down.
572115
FLIGHT
VERB 74, CAPCOM.
572116
CAPCOM
You ready for it now?
572118
GUIDO
Standby, FLIGHT, let me the flight - site configured.
572130
FLIGHT
EECOM, FLIGHT.
572132
EECOM
Go ahead, FLIGHT.
572133
FLIGHT
Does the temperature in tank 2 correspond with the pressure reading?
572136
EECOM
Let me see how close it is, FLIGHT.
572150
GUIDO
FLIGHT, GUIDANCE -
572150
FLIGHT
Go.
GUIDO
- we're ready.
572152
FLIGHT
Yeah; VERB 74 you want?
572154
GUIDO
Roger.
572155
FLIGHT
VERB 74.
572200
EECOM
FLIGHT, EECOM.
572200
FLIGHT
Go.
572201
EECOM
Temperature and pressure correspond - they verify that the pressure reading's right.
572206
FLIGHT
In tank 2?
572208
EECOM
In tank - standby.
572213
EECOM
That's right, FLIGHT. Tank 2.
572214
FLIGHT
Okay. Now, is it possible that we still have that tank and it's good? And we could somehow get power on B and use it?
  • MAIN DC BUS B
572222
EECOM
It's not likely, FLIGHT.
572224
FLIGHT
What's not likely, Clint?
572225
EECOM
Not likely to be able to - actually have anything left in the tank.
572231
FLIGHT
You don't think so?
572232
EECOM
I don't think so, but let's - we'll pulse (??) that one to you.
572235
FLIGHT
Alright.
572235
EECOM
Let me get you a time it looks like we've got on tank 1 here.
572238
FLIGHT
Alright.
572257
FLIGHT
TELMU, FLIGHT.
572258
TELMU
Go, FLIGHT.
572259
FLIGHT
Is there anything simple that we can refer the crew to to get them thinking about using the LM here? Have you got anything - checklist, paperwork that'll describe to them what your intentions are?
572312
TELMU
Negative, there's nothing documented in contingency. We're thinking about using the LM as a lifeboat, we have some procedures here. On the ground, though.
572319
FLIGHT
I'm sure you do. What do they amount to? Flying with the tunnel open?
572323
TELMU
Roger. Just a LM, low power - low - supplying power to the CSM.
572328
FLIGHT
Supplying power to the CSM?
572330
TELMU
Yes; about 5 amps.
572333
FLIGHT
To what?
572335
TELMU
To their MAIN BUS B.
  • Which hasn't actually functioned since the accident.
572337
FLIGHT
Okay. Where did - well, MAIN B is in bad shape. We don't have anything on MAIN B right now. What's that power for? TELMU?
572347
TELMU
Just anything they might need it for.
572349
FLIGHT
GNC and EECOM?
572350
GNC
Go, FLIGHT.
572351
FLIGHT
What power do you need from the LM?
572356
EECOM
Okay, we'll -
572401
FLIGHT
That's right.
572402
EECOM
We confirm that here.
572407
EECOM
FLIGHT, EECOM. Looks like we've got about 40 minutes left in that tank.
572412
EECOM
That's affirmative.
572413
FLIGHT
Yes.
572416
EECOM
Like to get battery A on charge, FLIGHT.
572421
FLIGHT
Now -
572445
FLIGHT
CAPCOM, just for his information we're not going to do a DPS burn until we hook around the Moon. Let them know that. And that's at about 79 +30.
  • This later turns out to be incorrect. FLIGHT is thinking of the PC+2 burn to send the spacecraft home from the far side of the Moon, but one correction burn ends up happening before then to get the spacecraft back on a return trajectory as early as possible.
572524
GUIDO
FLIGHT, GUIDANCE.
572524
FLIGHT
Go ahead.
572525
GUIDO
We didn't get a good recording on that VERB 74, we'll need them to do it again.
572531
EECOM
FLIGHT, EECOM.
572531
FLIGHT
Go ahead.
572532
EECOM
We'd like to get BATTERY A on charge, and we'd like to go ahead and get some more power off if we can. I'm not sure what the situation is on getting the computer up -
572540
FLIGHT
Clint, let me ask you now, is there anything you want to do - trying to pump up the other tank? Anything? Are you satisfied that both of these tanks are going down and we're past helping them? Even with batteries? That's what I'm getting at.
572553
FLIGHT
I'm trying to be sure that you're satisfied that there's nothing else we can do.
572557
EECOM
About all we can do is power down and let heat leak help us some - which is probably going to be trivial.
572603
FLIGHT
Okay. There's nothing else you want to try.
572607
FLIGHT
That's the only reason I'm delaying on this BATTERY A charge, Clint; to be sure you've gone through everything and you don't have any other tricks up your sleeve.
572613
EECOM
Sure don't, FLIGHT.
572615
FLIGHT
Okay, what are other power do you want to take off before we start the charge?
572618
EECOM
Well, looks like we're going to get into the control area. Whatever they can give up we'll have to come up with, here.
572623
FLIGHT
Okay, are you ready to go ahead and charge BATTERY A?
572626
EECOM
That's affirmative.
572626
FLIGHT
CAPCOM, why don't they get all they can in BATTERY A?
572629
CAPCOM
Okay, and Jack also asked me if we wanted to get a P52 and get the LM platform up with the -
572635
FLIGHT
What do you think of that? GUIDANCE?
572638
GUIDO
Go ahead, FLIGHT.
572639
FLIGHT
CONTROL. Question is, do you want to do a quick P52 on the CSM so that we can do an align to the LM? I don't know if we want to keep that LM platform up all that time anyway.
572647
CONTROL
That's too much power in my mind, FLIGHT, to keep that thing running for all that time.
572651
FLIGHT
Okay, therefore you don't -
572653
CONTROL
My vote is not to do that.
572654
FLIGHT
Yeah.
572655
GUIDO
Mine, too.
572656
FLIGHT
Okay, CAPCOM, we don't see any need in doing that, because we wouldn't be using the LM platform until about 79 hours.
572703
CAPCOM
Okay, you don't want to worry about the LM platform. We'll align it later with the AOT, huh?
572711
CONTROL
FLIGHT, CONTROL.
572716
FLIGHT
Yeah.
572741
FLIGHT
Did you say BATTERY A charge?
572742
CAPCOM
Yup.
572743
FLIGHT
Okay. EECOM, we charging A? Watch it, there, okay?
572746
EECOM
I'm watching; it's fine.
572748
FLIGHT
Okay.
572751
FLIGHT
EECOM?
572752
EECOM
Go, FLIGHT.
572753
FLIGHT
Go one more time around that room. We're letting this thing go down, although I realize we don't have any more thoughts to do, but I want to be sure that if there's anything we can do here, that we're doing it. To keep your -
572804
EECOM
Just power down, FLIGHT. All we can power down will put us in that much better configuration.
572808
FLIGHT
Okay, I got that part but are there any other things that you can do besides that, is what I'm getting at?
572813
EECOM
Negative, FLIGHT.
572814
FLIGHT
Okay. GNC, can you help EECOM there as to what else you might power down, if anything? I don't know whether you can or not.
572820
GNC
Roger, FLIGHT. We'll work on that, although we're in an ATTITUDE HOLD situation here, and I'd hate to give up the CMC and the IMU right now.
572829
FLIGHT
Yeah, well the CMC doesn't matter.
  • The SCS can perform an ATT HOLD without input from the CMC.
572835
GNC
Okay, we'll work on it, FLIGHT.
572835
EECOM
FLIGHT, we're not going to have anything in about 40 minutes here.
572850
EECOM
FLIGHT, EECOM.
572856
EECOM
FLIGHT, EECOM.
572858
FLIGHT
Go ahead.
572859
EECOM
Okay, we've got an update on the time. Looks like we've got about 18 minutes until we get down to 100psi, and that's the cutoff point.
572905
FLIGHT
Alright. But we're charging BATTERY A.
572907
EECOM
Well, that doesn't mean much in 18 minutes, though. But we're doing all we can do.
572910
FLIGHT
Alright. CONTROL and GUIDANCE, one more time.
572914
GUIDO
Go ahead.
572915
CONTROL
Go, FLIGHT.
572915
FLIGHT
Will it do any good at all to - TELMU, FLIGHT -
572919
TELMU
Go, FLIGHT.
FLIGHT
- join in here. The question is, should we try to do a quick align with the CSM and do an alignment in the LM? Can we keep an alignment in the LM up until 79 hours? Can you keep that kind of power on?
572931
TELMU
Standby.
572932
FLIGHT
The pilots are reporting it's difficult to do that alignment from scratch in the LM docked.
  • Astronauts were in the MOCR providing advice; in this case the docked configuration occludes vision and reflects light in a way that makes the alignment telescope hard to use.
572940
FLIGHT
And we get a tradeoff here as to whether we can stand that kind of power.
572945
TELMU
Standby 1, FLIGHT.
572947
FLIGHT
Alright. Pronto.
572957
GNC
FLIGHT, GNC. We'd save a little power if we turn all the jets off in QUAD C. We're pulsing those jets and we suspect that we've - closed the PROP ISOL VALVES in QUAD C so it's doing us no good right now, so we need to turn off all the jets in the quad.
  • The implication is not that they have chosen to close the valves, but that they have jarred shut. And in this case, to reopen them would require the dead DC MAIN BUS B.
  • Even with the propellant feed lines closed, with the thruster still on power would still be spent powering the solenoids in an attempt to fire.
573014
FLIGHT
Oh, okay, RCS SELECT -
573015
GNC
Right.
FLIGHT
RCS SELECT ?? check.
573027
FLIGHT
EECOM? Any need to dump water?
573034
EECOM
Negative on that, FLIGHT.
573036
FLIGHT
No sweat there, Jack.
  • CAPCOM Jack Lousma, still on shift since before the accident.
573046
EECOM
FLIGHT, EECOM.
573047
FLIGHT
Go ahead.
573048
EECOM
They get the POWER AMPL off? I heard them talking about it a while ago. I don't know.
573051
INCO
No, they don't.
573053
EECOM
We can eliminate that central in the 85 foot gainway.
573057
INCO
That's not exactly true -
573059
EECOM
Okay.
INCO
We're looking at it to see how far down we can go.
573102
FLIGHT
Alright.
573103
EECOM
I believe GNC has got some things we can turn down here.
573106
FLIGHT
Yeah, he just - AUTO RCS in Quad Charlie can go off; we've got that Quad PROP ISOL'd. Which I didn't know, but.
573112
EECOM
Pardon?
573113
FLIGHT
Quad Charlie AUTO RCS - GNC, FLIGHT.
573117
FLIGHT
GNC, FLIGHT.
573119
GNC
Go ahead, FLIGHT.
573120
FLIGHT
Confirm: Quad Charlie is PROP ISOL'd off, right?
573124
GNC
Well, we haven't confirmed that, FLIGHT, but it appears that that's the situation we're in. The shock of the O₂ thing, it probably closed those valves -
573135
FLIGHT
Oh, you think -
GNC
- and we haven't been able to open them because those are powered off of MAIN B.
573140
FLIGHT
Mm. Okay.
573141
GNC
But A appears to be working okay.
573143
FLIGHT
Okay. We think Quad Charlie's PROP ISOL'd off, Jack, so in that case we ought to turn off the AUTO RCS SELECT; that'll save a little power. Probably not much.
573154
CAPCOM
Yeah - you want AUTO RCS OFF on Charlie?
573156
FLIGHT
Uh huh.
573157
CAPCOM
How about antennas? How are we doing? Did I hear them give me some bad COMM there?
573202
INCO
We're in pretty good shape right now, FLIGHT.
573204
CAPCOM
Okay.
573205
FLIGHT
EECOM, FLIGHT.
573206
EECOM
Go ahead, FLIGHT.
573207
FLIGHT
Let me try one more time. Is it possible that if we got power to MAIN B that we could get TANK 2 powered up and up the pressure?
573217
EECOM
We don't feel like that's a possibility, FLIGHT. We might conceivably get power to B but we don't feel like we can get anything out of TANK 2.
573224
FLIGHT
Okay, now why is that? Tell me why.
573227
EECOM
It's because the numbers we're looking at indicate that it's essentially ambient.
  • Pressure-wise.
573233
FLIGHT
Hold on.
573235
FLIGHT
Okay.
573239
FLIGHT
GNC, watch we don't pick up any rates now, will you please?
573242
GNC
Okay, FLIGHT.
573252
FLIGHT
EECOM, FLIGHT.
573254
EECOM
Go, FLIGHT.
573254
FLIGHT
How long have we got now in the cell?
573256
EECOM
Last account we had 18 minutes, let me get an update.
573258
FLIGHT
Okay. TELMU, what have we got to do to power up to get some COMM on the LM?
573302
TELMU
Okay FLIGHT, we've got a procedure here that gets power up first on the LM.
573314
FLIGHT
Yeah. EECOM, FLIGHT.
573316
EECOM
Go, FLIGHT.
573317
FLIGHT
Yeah, that gets us power but what do you want up? Just the COMM?
573321
EECOM
We'll have to have an environment for the crew, the way this can be -
573323
FLIGHT
That's what I'm asking you, EECOM and TELMU. We've got to figure out how - we're just about out of CSM talkin'.
573330
TELMU
Okay.
573331
FLIGHT
What do you want them to power up in the LM?
573333
TELMU
Standby 1.
573335
EECOM
FLIGHT, EECOM -
573335
FLIGHT
Alright.
EECOM
- out input is, here, that we'll have to live out at the LM.
573338
FLIGHT
I understand.
573341
EECOM
Okay.
573355
FLIGHT
We've got a power up procedure here from TELMU but we've got to start thinking about what you want pow - configured in the ECS and the COMM.
573401
EECOM
Right.
573402
TELMU
That gets power in the LM, and then we'll get you some COMM and TM here.
573405
FLIGHT
Yeah - do we need to send any power to the CSM? For the platform, or anything? Or, can we even do that?
  • Sending power back over to the CSM wasn't part of the original design consideration.
573413
EECOM
I'm not sure we can do that yet.
573414
FLIGHT
Can't do that.
573417
FLIGHT
That was a long time ago.
573418
CAPCOM
Okay. When do you want them to start working on this procedure?
573421
FLIGHT
Well, tell them they gotta start thinking about the power - going over and powering right now because they're going to have lights problem in a little while in the CSM.
573427
CAPCOM
Okay, I'll send it up. And they wanted to know if we wanted them to try to reset the PROPELLANT VALVES in the secondaries.
573436
GNC
Yeah, roger, FLIGHT.
573437
FLIGHT
GNC?
573438
GNC
That won't do any good because we lost MAIN B and those valves are powered off of B.
573440
FLIGHT
No - no, CAPCOM. It's off MAIN B.
573534
FLIGHT
EE - TELMU, FLIGHT.
573536
TELMU
Go, FLIGHT.
573536
FLIGHT
Does this title - this PG&E (??) page - mean anything more than just power up the LM?
573540
TELMU
No. That's all.
573541
FLIGHT
Alright.
573544
EECOM
FLIGHT, EECOM.
573552
EECOM
FLIGHT, EECOM.
573553
FLIGHT
Go ahead.
573553
EECOM
We'd like to go ahead and power down the CSM all we can except leave that battery charger on. Of course, leave a little light because we're going to be there in 15 minutes anyway.
573603
FLIGHT
CAPCOM, we're going to out of power in the CSM in 15 minutes in the fuel cells. We want them to start getting the tunnel clear and get ready and get over there and power up the LM as soon as they can, they ought to send somebody over there. EECOM, what ought they do to leave the cockpit?
  • At this point, the CSM is clearly a lost cause. But in the 15 minutes of power left, the controllers and crew need to ensure that the spacecraft life support, illumination, communications, and navigation are all ready to go in the LM, or the crew will be flying blind in every possible way: unconscious, in the dark, with no support or instructions from the ground, and with no idea which way the spacecraft is pointing.
573616
EECOM
Say again?
573617
FLIGHT
EECOM and GNC. What ought we do to leave the CSM cockpit? We're going to lose power on the buses, now what do you want to switch off?
573627
EECOM
Power it down, FLIGHT. All of it.
573627
GNC
The CMC and the IMU, mainly, FLIGHT.
573824
FLIGHT (off loop)
That's the problem.
573841
EECOM
FLIGHT, EECOM.
573842
FLIGHT
Go ahead.
573843
EECOM
Last ditch stand on O₂ tank 2, let's turn the fans on.
573848
EECOM
That'll cost about 1 amp.
573849
FLIGHT
What are they off? MAIN A?
573852
EECOM
They're on AC.
573854
FLIGHT
Okay. Fans in tank 2 ON.
573857
EECOM
Fans, tank 2, ON.
573859
FLIGHT
CAPCOM, FLIGHT.
573902
FLIGHT
Tell them to try the fans in tank 2. They're off the AC and last ditch stand we'll try the fans in tank 2. Turn the fans on in TANK 2, it only takes 1 amp.
573911
CAPCOM
Okay.
573926
FLIGHT
TELMU, GUIDANCE, and CONTROL; FLIGHT.
573928
CONTROL
CONTROL, here.
573928
GUIDO
Go, FLIGHT.
573929
FLIGHT
Do you know status of the CSM platform right now?
573933
GUIDO
Negative, FLIGHT. It's - good as far as we know.
573938
FLIGHT
No, no, no. Do you know its orientation? Do you know its orientation?
573942
GUIDO
It's PTC REFSMMAT.
573944
FLIGHT
Yeah. You know what you've got, and so okay.
573949
FLIGHT
EECOM?
573950
EECOM
Go, FLIGHT.
573951
FLIGHT
Did he get it? Fans 2 ON?
573953
EECOM
We can't tell, FLIGHT.
573955
FLIGHT
He got it, did he, Jack? Number 2 fans?
573957
CAPCOM (off loop)
He said he got it.
573958
FLIGHT
Okay.
573959
FLIGHT
GUIDANCE, CONTROL, and TELMU. The point is, should we, quick - if you guys can't run out the power steady, run out - align the - your IMU to the CSM while we study the problem? See what we got in the way of power?
574013
FLIGHT
Tom Stafford is concerned that they'll have a hell of a time getting the platform aligned in the LM with AOT.
  • It was already known that sun glare could cause problems finding star positions with the vehicles docked. On top of that, debris would prove a huge issue once this procedure was actually attempted.
574019
GUIDO
I agree, FLIGHT.
574020
CONTROL
I agree, too, FLIGHT.
574021
FLIGHT
Okay. What's should we tell them to do?
574024
CONTROL
It's going to take about 15, 20 minutes as I understand it to do that procedure, that right GUIDANCE?
574027
FLIGHT
Which procedure?
574028
GUIDO
The docked alignment -
574029
CONTROL
Docked align.
574030
CAPCOM
How about you give me an Activation page?
574031
FLIGHT
How about - a -
574032
GUIDO
Well, how long does it take to -
FLIGHT
- how about a coarse align? At least you get - at least you start in -
574036
GUIDO
Okay, that's in the ballpark, FLIGHT; that's correct.
574038
FLIGHT
Okay, now. What do you - what do we do to get this done? EECOM, you got all my power in the LM with that procedure? What power have you got on the LM?
  • It's possible FLIGHT meant to ring TELMU here.
574045
GUIDO
FLIGHT, GUIDANCE.
574046
FLIGHT
Go ahead.
574047
GUIDO
We ought to go ahead and go a P52 first in the CSM and get -
574049
FLIGHT
That's what I'm asking you -
GUIDO
- a reference. Right -
FLIGHT
- do you know? Well, do you have one now? We don't have much time! Do you have a good one now? As far as you know?
574056
GUIDO
A good alignment?
574057
FLIGHT
Yeah, that's what I'm asking! Do you have a good alignment?
574101
GNC
FLIGHT, GNC.
574102
FLIGHT
I'm not worried about the tenths of a degree, either.
574105
EECOM
FLIGHT, EECOM.
574105
GUIDO
Well, it ought to be that good, FLIGHT.
574106
FLIGHT
Yeah, okay. So we don't need to do a P52 -
574107
EECOM
FLIGHT, EECOM.
FLIGHT
Go ahead.
574109
EECOM
Okay, we need to open up the surge tank. The manifold pressure is dropping.
574116
FLIGHT
Uh - okay. Wouldn't you rather power that from the LM - pump that up from the LM?
574122
EECOM
Well, we - - we've got to get into the LM first, FLIGHT.
574127
FLIGHT
CAPCOM, get them going in the LM. We've got to get the oxygen on in the LM.
574137
TELMU
FLIGHT, TELMU.
574144
TELMU
FLIGHT, TELMU.
574145
FLIGHT
Go ahead.
574146
TELMU
Okay, we have a procedure here. Probably the easiest thing is to refer them to Activation -
574152
FLIGHT
Go.
574152
EECOM
FLIGHT, EECOM.
TELMU
- 11 and Activation 12.
  • If you want to follow along these Activation pages, they start around page 6 of this PDF.
574155
FLIGHT
What will that do for us?
574156
TELMU
That gives them the COMM -
574157
FLIGHT
Okay, Activation 11 -
574200
TELMU
And 12.
FLIGHT
- and 12.
574203
TELMU
13, step 1.
574205
FLIGHT
Okay. Got that, Jack?
574206
TELMU
And cross out the VHF stuff.
574208
FLIGHT
Okay -
574209
EECOM
FLIGHT, EECOM.
FLIGHT
- does that give us ECS also?
574211
TELMU
That gives us glycol circulation.
574213
FLIGHT
Okay, how about ECS? Come on, I need some oxygen.
574216
EECOM
Disregard the surge tank request.
574217
FLIGHT
Alright.
574218
FLIGHT
Give me some oxygen.
574219
TELMU
Negative.
574219
FLIGHT
Do I need some oxygen right now?
574221
TELMU
Roger - just go to Activation step 1.
  • TELMU probably did not mean to say "step" here.
574226
FLIGHT
And start there, huh?
574228
TELMU
Right.
574229
FLIGHT
And go how many steps? Activation -
574232
TELMU
Just 1. Step 3.
574236
FLIGHT
Uh.
574237
TELMU
Activation 1, step 3, FLIGHT.
574239
FLIGHT
Step 3?
574240
TELMU
Right.
574240
FLIGHT
And then what? Activation 11?
574243
TELMU
Activation 11 -
574244
FLIGHT
12?
574245
TELMU
12, 13 step 1.
574248
FLIGHT
Okay. Got that, CAPCOM?
574251
CAPCOM
I've got Activation 1 step 3; Activation 11, 12, 13 step 1.
574255
TELMU
Roger, and FLIGHT, in Activation 11, omit step 1.
574259
FLIGHT
Alright.
574301
FLIGHT
Okay. That'll give them what, now; glycol flow, COMM, and some ECS? Is that right? That's what we want.
574308
TELMU
Roger.
574308
FLIGHT
Okay. That's what we want.
574326
TELMU
FLIGHT, TELMU.
574326
FLIGHT
Go.
574327
TELMU
One other input: we also need the DEMAND REGs to CABIN.
574332
FLIGHT
Roger.
574355
FLIGHT
Do you want them to do Activation 1 down to step 3 - TELMU?
574400
TELMU
That's affirmative.
574401
FLIGHT
It's down to step 3.
  • The silly thing about this miscommunication is that Activation 1 only contains 3 steps to begin with.
574403
FLIGHT
Down to step 3.
574409
FLIGHT
That's 12 and 13.
574411
FLIGHT
And DEMAND REGs to CABIN.
574417
FLIGHT
Right.
574419
FLIGHT
TELMU, when do we do DEMAND REGs to CABIN? That's the end of those three steps?
574422
TELMU
At the end of the sequence.
574423
FLIGHT
At the end of the sequence, DEMAND REGs to CABIN, Jack.
574427
FLIGHT
And I - I'm still not satisfied he's got Activation 1 down to step 3.
574437
EECOM
FLIGHT, EECOM. The voltage is going to begin to drop and we'll need to power down with it.
574442
FLIGHT
Okay. What do you want them to do? Turn everything off?
574445
EECOM
Leave the lights on, and - leave the lights on. As far as they need it.
574449
FLIGHT
And where do they power it from, the LM?
574451
EECOM
That'll be power from the CSM as long as we have anything. We will bring up BAT A when we get down about 25 volts or so.
574457
FLIGHT
Why?
574459
EECOM
Until they get into the LM and keep their lights up and whatever they have to have.
574503
GNC
We don't want to destroy the IMU alignment in the CSM right now, so we've got to keep that up, I assume, until you get the LM aligned, right?
574508
FLIGHT
Mm. Okay.
574511
EECOM
We'll do that by bringing BAT A on MAIN A.
574514
FLIGHT
Well, we'd better quickly do that or we're going to be losing it.
574516
EECOM
We've got 3 or 4 minutes, FLIGHT.
  • FLIGHT appears to laugh at this line.
574518
FLIGHT
Yeah -
574519
GNC
But the thing is, we want to pass to them - when he does see it go down. Or, start going down. To get BATTERY A On.
574524
FLIGHT
Is that -
574525
GNC
To watch it.
574525
FLIGHT
Now, you think we really want to spend that to keep the platform on? We're using the entry batteries, too.
574531
EECOM
What we take out of the battery we won't get back.
574534
FLIGHT
That's right.
574536
FLIGHT
No. Down to step 3. Down to step 3. All the way down to step 3.
574549
FLIGHT
Yeah. Alright, okay. I just want to be sure we're sure we want to do that. And quick, get a coarse align. CONTROL and TELMU, will the steps I got give me a coarse align?
574601
FLIGHT
CONTROL and TELMU -
574602
TELMU
Negative, FLIGHT.
574603
CONTROL
Go ahead; CONTROL here.
574603
FLIGHT
Will those steps that we've passed so far get me a coarse align?
574607
TELMU
Negative, that just gets you -
574608
CONTROL
Standby.
574609
FLIGHT
What else I gotta do to get a coarse align?
574611
CONTROL
Standby, FLIGHT.
574612
EECOM
Can we get those read up to the crew to step the power down? Of course, they can power down everything, but here's a good start.
574617
FLIGHT (off loop)
?? the battery will drain as they power down?
574619
EECOM
Roger.
574620
FLIGHT (off loop)
Then it's just the IMU?
574621
EECOM
That's roger.
574622
FLIGHT
Okay, but we wanted to keep that up for a little while, I thought you just said, with the BATTERY A. To get a coarse align on the LM.
574628
EECOM
Well, maybe there's a bit of confusion here.
574630
FLIGHT
Yeah. You just gave - you don't want to turn the IMU off until we get a coarse align on the LM, right?
574635
EECOM
That's affirm, FLIGHT.
574635
GNC
That's affirm, FLIGHT. And we'll support a battery until you get that.
574637
FLIGHT
Okay. CAPCOM, we want to power on down the CSM only. We want to put BAT A on - about now? EECOM?
574644
EECOM
Negative, not yet, FLIGHT. We'll let you know.
574646
FLIGHT
We're going to put BATTERY A on - can you put it on while it's charging?
574650
Maroon EECOM
No. We'll have to take the charge off.
  • From here out, two EECOMs are active on the loop. Maroon EECOM is John Aaron.
574651
EECOM
Negative.
574652
FLIGHT
We want to take -
574654
Maroon EECOM
We'll have to power down the charger and put it on MAIN A.
574656
FLIGHT
Alright.
574705
TELMU
The VHF is not required, FLIGHT.
574708
FLIGHT
No VHF.
574712
FLIGHT
Well.
574726
FLIGHT
TELMU and CONTROL.
574727
CONTROL
Go ahead.
574728
FLIGHT
Look, it's unclear enough to me that I'm going to try to get a coarse align in the LM. You know where we are, then, right, Will?
  • GUIDO Will Presley.
574733
FLIGHT
Alright. Now, what do I have to do to get it?
574735
CONTROL
Okay, I'm getting you that step right now, FLIGHT.
574737
FLIGHT
Okay. CAPCOM, FLIGHT.
574739
CAPCOM
Go ahead.
574740
FLIGHT
When we get a little lower, we're going to have them pull BAT A off, and we'll get him to put it on MAIN BUS A. We are then going to try to hold up the IMU long enough to get a coarse align in the LM, and then we'll see whether we're going to keep that coarse align up or not, but for right now we're running the profiles and we'll have to determine that.
574755
CAPCOM
Okay.
574755
FLIGHT
That's the course of action, let Jack know that much.
574757
CAPCOM
Okay. And he wants to know what he's going to see and what he should do when he sees it happen to FUEL CELL 2.
574804
FLIGHT
We're interested in keeping up the IMU and the lights, for him to see. That's all.
574810
FLIGHT
EECOM, GNC: everything else goes off? INCO?
574815
GNC
That's affirm, FLIGHT.
574816
INCO
Good plan.
574816
FLIGHT
GNC? Anything else goes off?
574817
GNC
Roger, FLIGHT.
574819
EECOM
The only concern we have, FLIGHT, I just -
574822
FLIGHT
Yeah, go ahead.
574823
EECOM
- is the IMU heater power. And - for the CSM.
574828
FLIGHT
Well? What do you want?
574829
EECOM
Well, if you want to maintain the IMU for re-entry, we've got to have the heater power on.
574833
FLIGHT
How much is that?
574834
EECOM
Standby, we'll take a look.
574845
EECOM
FLIGHT, EECOM, we can take it off at any time.
574847
FLIGHT
Take it off now, Jack.
574849
FLIGHT
Take it off.
574853
CAPCOM
Okay, I need some LM IMU align procedures.
574856
FLIGHT
Yeah.
574858
EECOM
FLIGHT, EECOM.
574858
FLIGHT
Go.
574859
EECOM
We need to go ahead and start that power down any time.
574902
FLIGHT
Okay, do you want me to put BATTERY A on yet?
574904
Maroon EECOM
Negative, FLIGHT.
574904
EECOM
Negative, we'll give you a cue on that.
574906
FLIGHT
Okay. Where do you want me to tell them to start, Clint?
574909
EECOM
Keep your lights up and everything else has got to go.
574912
FLIGHT
Everything else except the IMU.
574913
Maroon EECOM
That's affirm, FLIGHT.
574914
EECOM
Roger.
574914
FLIGHT
Okay. Say again?
574917
EECOM
That's affirm.
574917
FLIGHT
How about the COMM? We don't have COMM yet with the LM.
574920
INCO
As soon as you take that POWER AMPL off we're going to lose data.
  • The downlinked telemetry feed.
574923
FLIGHT
Okay, well let's - yes, let's be clear what we're doing here.
574929
FLIGHT
We're discontinuing BATTERY A.
574932
FLIGHT
Okay, so far I've got the IMU and the POWER AMPL up. Anything else?
574940
INCO
That should do it, FLIGHT.
574942
FLIGHT
How about COMM?
574942
INCO
Leave the PCM up, too. Leave the COMM configuration alone.
574945
FLIGHT
Yeah, leave the COMM configuration alone, CAPCOM, until we get COMM with the LM.
574951
TELMU
FLIGHT, TELMU.
574952
FLIGHT
Go.
574953
TELMU
Okay, we've got one more - we want to make sure his SUIT FAN 1 is - our SUIT FAN is positioned to 1.
  • In both spacecraft, the suit fans were run open-circuit with the entire cabin to scrub the air when the astronauts were not wearing suits. This is the answer to the oxygen request from earlier.
575001
CONTROL
FLIGHT, CONTROL.
575003
TELMU
And the - on panel 11 we want ECS SUIT FAN 1 breaker closed.
575008
FLIGHT
Okay, you want SUIT FAN number 1 on.
575010
TELMU
Yeah.
575010
FLIGHT
With the breaker. Go ahead, CONTROL.
575012
CONTROL
Okay, FLIGHT, here's what we need.
575013
FLIGHT
Alright, standby. CAPCOM, in the LM we need the SUIT FAN number 1 and its circuit breaker on to get flow, and CONTROL's coming to me with the IMU procedure. Go, CONTROL.
575026
CONTROL
Panel 11. LGC/DSKY closed.
575030
FLIGHT
That's the circuit breaker?
575031
CONTROL
Yes.
575032
FLIGHT
Panel 11 closed; yup.
575034
CONTROL
Okay. Then go to Activation page 25, do steps 1, 2, and 3.
575039
FLIGHT
1, 2, and 3? And what will that get us?
575043
CONTROL
Okay, that'll get everything up and running and the platform turned on.
575046
FLIGHT
And will that get us a coarse align?
575047
CONTROL
Negative, that'll put you in P00.
575048
FLIGHT
Okay, and then do -
575049
CONTROL
Go to Activation 37.
575051
FLIGHT
Okay.
575051
CONTROL
Docked IMU coarse align procedure is there for you.
575054
FLIGHT
Okay. Got it, CAPCOM?
575055
CONTROL
Excuse me - 30. That's Activation 30, FLIGHT.
575058
FLIGHT
Okay.
575059
CAPCOM
Okay. I've got LGC/DSKY close, Activation 25 steps 1, 2, and 3, Activation 30.
575105
FLIGHT
Okay, TELMU, one more question. Are we bringing up glycol flow here?
575108
TELMU
We brought up circulation. We have not activated the boiler.
575111
FLIGHT
Should we?
575112
TELMU
I don't know; we're working on it, FLIGHT.
575113
FLIGHT
Alright.
575114
EECOM
FLIGHT, EECOM.
575115
FLIGHT
Go.
575116
EECOM
Okay, when we go through this power down when we bring BAT A up, we want them to go through the fuel cell shutdown procedure for fuel cell 2, just in case the pressure should recover and we would still have a fuel cell later. Which is not likely, but it's not going to cost us anything to do it except a little time.
575132
FLIGHT
FUEL CELL 2 shutdown; that closes the reactants?
575135
EECOM
I'm - I'm sorry. Standby. Standby's the word.
575138
FLIGHT
Yeah. Okay.
575142
FLIGHT
You want me to put fuel cell number 2 on standby when? After we put BATTERY A on?
575147
EECOM
That's affirmative.
575148
FLIGHT
How close are we to doing that?
575150
EECOM
Well, we're looking for it any time now.
575152
FLIGHT
Alright.
575204
FLIGHT
Have we got anybody over in the LM yet, Jack? Can you tell? Somebody climbed over there? They're both over there?
575208
CAPCOM
Yeah, we've got them both over there, and they've just taken the procedure for the activation of the IMU.
575216
FLIGHT
Yeah. Okay. I don't know how long we'll be able to keep that up, but at least we'll have something.
575222
CAPCOM
Okay, and what other things you've got to go up that I missed while I was talking?
575238
CAPCOM
Have we given them the signal on the battery yet?
575244
FLIGHT
Uh, no.
575245
EECOM
Negative on that.
575246
Maroon EECOM
About another 20 psi, FLIGHT.
575248
FLIGHT
GNC, FLIGHT. What do you want on the heater? Circuit breakers?
575251
GNC
We're still working on that, FLIGHT. We're trying to get it - find out if we can power them down and bring the platform up later on, whether we've really got a problem there or not.
575259
FLIGHT
Alright. Go ahead. We'll have BMAGs.
575302
GNC
Roger.
575319
EECOM
FLIGHT, EECOM.
575320
FLIGHT
Go ahead.
575321
EECOM
We can turn the GLYCOL PUMP off anytime.
575329
EECOM
FLIGHT, EECOM.
575330
FLIGHT
Go ahead.
575330
EECOM
BYPASS on the primary rads.
  • Radiators, which cooled the water/glycol coolant.
575332
Maroon EECOM
Turn the GLYCOL PUMP off.
575334
FLIGHT
CAPCOM, he can turn the GLYCOL PUMP off in the CSM.
575338
CAPCOM
Okay.
575339
EECOM
BYPASS on the rads.
575340
FLIGHT
BYPASS on the rads, and then turn the pump off, huh?
575343
EECOM
Roger.
575343
Maroon EECOM
In that order.
575343
FLIGHT
Okay. BYPASS, and then PUMP off.
575346
TELMU
FLIGHT, TELMU.
575347
FLIGHT
Go.
575347
TELMU
Okay, we should be okay thermally in the LM vehicle until we get telemetry, and we'll watch it until we tell you to turn on the boiler.
575357
FLIGHT
Okay, fair enough. You can look at TM before you tell me about the sublimators. Thank you.
575400
TELMU
Roger that.
575401
FLIGHT
BYPASS and the GLYCOL PUMP coming off.
575413
CAPCOM
Okay, FLIGHT. Anything else I missed while I was talking to them there?
575416
FLIGHT
Uh, I don't know, Jack. I haven't been following everything you've said, you did tell them that we're going to be putting BATTERY A on to keep the IMU up. I don't know how much time we've got here; another 20psi was the last I heard.
575427
CAPCOM
Yeah, and I'm standing by for a mark on that.
575430
FLIGHT
Yeah. How much power have we got left on in the CSM, EECOM? We haven't got a lot on -
575435
EECOM
We've got about 40 amps.
575436
FLIGHT
Okay. What else can we take off right now?
575439
EECOM
We passed the list to CAPCOM while we had the IMU heaters - IMU on it. Everything on that list but the IMU.
575446
FLIGHT
Yeah. Got it, Jack? You want them to start powering that stuff down, right Clint?
575452
EECOM
Roger.
575453
FLIGHT
Okay, Jack. Everything but that IMU.
575513
EECOM
FLIGHT, EECOM.
575513
FLIGHT
Go.
575514
EECOM
O₂ TANK 2 FANS off.
575518
FLIGHT
You're giving up there, huh?
575519
EECOM
Giving up.
575519
FLIGHT
CAPCOM, O₂ FANS 2 off.
575523
CAPCOM
Say again, please?
575524
FLIGHT
O₂ TANK 2 FANS can go off. There's nothing happening there.
575528
EECOM
That's confirmed. All FUEL CELL PUMPs off, FLIGHT. That's 1, 2, 3.
575531
FLIGHT
You want to shut 2 down, now?
575533
Maroon EECOM
That's affirm.
575533
EECOM
Just the pumps. Just turn the pumps off.
575535
FLIGHT
Oh. Okay. All FUEL CELL PUMPs off, CAPCOM. That may be a verify.
575539
CAPCOM
Okay, verify all FUEL CELL PUMPs off, and -
575541
FLIGHT
Fans off.
CAPCOM
- fans off in O₂ TANK 2.
575543
FLIGHT
Yeah.
575602
INCO
FLIGHT, INCO, we have the LM downlink coming in.
  • Good news; the beginning of communications with the Lunar Module.
575610
CAPCOM
We don't want them fans and heaters in TANK 1, do we?
575614
FLIGHT
EECOM, you don't want anything on in TANK 1, do you? Or do you?
575617
EECOM
Roger, we want them all on.
575619
FLIGHT
Leave them all on in TANK 1, CAPCOM.
575620
EECOM
That's affirmative.
575621
CAPCOM
Okay.
575627
FLIGHT
I'm still seeing 40 amps. What all have we got on there, EECOM? CMC? IMU?
575632
EECOM
Roger, FLIGHT.
575633
FLIGHT
And some COMM.
575634
EECOM
IMU and CMC still up right now.
575635
FLIGHT
And SUIT FAN.
575638
FLIGHT
Now, EECOM, FLIGHT.
575639
EECOM
Go ahead, FLIGHT.
575640
FLIGHT
Look, I'm worried about shutting this thing down so that it's safe when we want to repower it from the entry batteries.
575645
EECOM
Roger. We don't - we're going to ask you to bring up BAT A whenever we see the voltage begin to drop off.
575649
FLIGHT
I understand that, I still want some kind of closeout configuration. Okay?
575652
EECOM
Affirmative.
575653
FLIGHT
GNC, same with you. And I haven't heard from you on the heaters yet, on the IMU.
575657
GNC
Roger, FLIGHT. Preliminary look at it, looks like we can pull all the circuit breakers - power on the heaters. But we're still trying to get a handle on it.
575704
FLIGHT
We may well have no choice.
575705
GNC
That's a fact.
575707
FLIGHT
I don't know - how many amps do they take?
575709
GNC
10.
575710
FLIGHT
Aw! 10 amps!?
575711
GNC
Roger.
575712
FLIGHT
I got - I'm looking at a hundred and - I'm looking at - fif, sixt, 80 hours!
575716
GNC
Okay. Roger.
575718
FLIGHT
That's academic!
  • Given the LM had a total battery capacity of around 2,250 amp-hours, running the heaters at 10 amps for 80 hours (10 amps × 80 hours = 800 amp-hours) was too much to even consider.
575719
GNC
I understand.
575720
CAPCOM
And FLIGHT, CAPCOM.
575722
FLIGHT
Go ahead.
575723
CAPCOM
Okay, I've got a procedure for COMM activation; 28 on the panel here. It came from somewhere, is this something you want to go up?
575730
FLIGHT
INCO, is that the COMM activation in the LM?
575731
INCO
Negative, FLIGHT, the COMM activation is the same as you've got over there, except we want to change to normal VOICE when he gets squared away. I gave him some steerable angles in case we want to activate it. So I have it - and that's the procedure.
  • CAPCOM
  • Angles to point the steerable S-Band antenna at.
575741
FLIGHT
Can we go on the OMNI right now?
575743
INCO
Roger. As we come up on the Goldstone with the 210 we'll be alright.
  • The Goldstone MSFN site in Southen California.
575746
NETWORK
We have AOS with the 210 now, FLIGHT.
  • For the last 10 seconds or so noise has been creeping into the audio. This is the link with the LM coming in. The cause of that noise will become a critical question and problem in the coming hours.
575748
FLIGHT
We'll stick with the OMNI, yeah, Jack. So don't do anything with that.
575751
NETWORK
FLIGHT, we have OMNI data on the LM right now.
575753
FLIGHT
We have AOS on the LM.
575756
GNC
FLIGHT, GNC.
575756
FLIGHT
Go ahead.
575757
GNC
We've got a better number on that heater power; it only draws about 0.8 amps. So we'd like to leave that up.
575804
CONTROL
FLIGHT, CONTROL.
575805
FLIGHT
Go ahead.
575806
CONTROL
The temp looks good. 129.9.
575806
FLIGHT
Okay. 0.8 amps for the rest of the mission is going to cost me 64 amp-hours. GNC, FLIGHT.
575816
GNC
Go ahead, FLIGHT.
575817
FLIGHT
It's going to cost me 64 amp-hours.
575822
FLIGHT
I can't afford that! Can't I bring it back up without them? Is that absolutely known?
575829
GNC
Yeah, I think you can, FLIGHT, but the platform's way off -
575833
FLIGHT
EECOM, FLIGHT.
575834
EECOM
Go, FLIGHT.
575835
Maroon EECOM
Go ahead, FLIGHT.
575835
FLIGHT
Turn around here a minute. He's talking about the IMU heater, it's going to cost me 0.8 amps, I'm - 142 hours at landing - I'm 80 hours away. That's 64 amp-hours.
575847
EECOM
Forever?
575848
FLIGHT
Can you hack that out of the entry batteries?
575850
GUIDO
FLIGHT, GUIDANCE.
575851
EECOM
We might hack it transferring power back from the LM to the CSM, but we can't hack it on the batteries.
575856
Maroon EECOM
FLIGHT, EECOM. Since it's only 0.8 amps let's hack it for a little while here. Then we -
575859
TELMU
FLIGHT, TELMU.
575900
FLIGHT
Go ahead, TELMU.
575900
TELMU
Okay, FLIGHT. It looks like they are still on low-volt taps. We need to get the Activation step 12 substep 3 and go to high taps on the LM batteries, 1 through 4.
575913
FLIGHT
Got it, Jack?
575914
CAPCOM
You want the high taps on the batteries, 1 through 4?
575917
TELMU
Roger, that's Activation 12 step 3. Looks like they're still on low taps.
580000
FLIGHT
CAPCOM, did you give them that about the high taps?
580003
CAPCOM
I gave them that about the high taps and they're going through it -
580009
TELMU
FLIGHT, looks like we're going to high taps.
580011
FLIGHT
Alright.
580014
INCO
FLIGHT, INCO.
580016
FLIGHT
Calling, FLIGHT.
580017
INCO
INCO. We'd like to get normal voice on the LM on panel 12. FUNCTION switch to VOICE.
580025
FLIGHT
It's coming at you now.
580026
INCO
Okay.
580027
FLIGHT
Okay. Everybody in the room, how about sitting down a minute, and just keeping it a little bit quiet?
580033
CONTROL
FLIGHT, CONTROL.
580034
FLIGHT
Go ahead.
580035
CONTROL
All our systems look real good on LOW BIT RATE.
  • Not that low bitrate is good, but that with the limited data they have on low bitrate things look healthy.
580037
FLIGHT
Thank you.
580038
TELMU
FLIGHT, we look good. TELMU's good.
580039
FLIGHT
Okay.
580040
TELMU
We need SUIT GAS diverted to CABIN.
580043
FLIGHT
SUIT GAS diverted to CABIN in the LM, CAPCOM.
580059
FLIGHT
Okay, they're doing the coarse align now. CONTROL, can you see your platform?
580102
CONTROL
Negative. We're on LOW BIT RATE.
580106
GUIDO
FLIGHT, GUIDANCE.
580107
CONTROL
We don't have resolvers.
580109
FLIGHT
Say again?
580110
GUIDO
FLIGHT, GUIDANCE.
580110
FLIGHT
Go.
580111
GUIDO
Okay, we want them to go all the way through to the fine align, past the angles test so we can get a good alignment with the CSM because that CSM is continuing to move.
580118
FLIGHT
Which step do you want to get to?
580120
GUIDO
We want to go all the way through to step 7 in the LM Activation.
580124
CAPCOM
What page?
580125
CONTROL
31.
580125
GUIDO
On page 31.
580127
CAPCOM
Okay, step 7, page 31.
580129
FLIGHT
All the way through that, Jack, that's what he means.
580130
GUIDO
That's affirm.
580144
EECOM
FLIGHT, EECOM.
580145
FLIGHT
Go.
580145
EECOM
Okay, we expect to put the battery on any time now. We're still going to give you a cue on it.
580150
FLIGHT
Okay.
580204
FLIGHT
EECOM, FLIGHT.
580205
EECOM
Go ahead, FLIGHT.
580206
FLIGHT
While they're working the problem, do you want me to leave BATTERY A on MAIN BUS A?
580213
EECOM
When we give you the cue, we'll put -
580213
FLIGHT
For that IMU heater?
580217
FLIGHT
Is that what your plan is?
580218
EECOM
Until we get - until we get through to the LM, that's right.
580221
FLIGHT
Okay. Now, doesn't - GNC, I wanted to hear from both you guys whether you want to leave that on the whole time, but we can stand 0.8 for now on the entry bat.
580230
GNC
Roger, FLIGHT. We're - we feel like we'd probably be able to power it down.
580233
FLIGHT
Okay.
580234
GNC
Preliminary look at it.
580235
CONTROL
FLIGHT, CONTROL.
580236
FLIGHT
Go ahead.
580237
CONTROL
We indicate he still has the LDG RDR HEATERS on; he can open those up if he desires - panel 11 row 3.
580242
FLIGHT
Okay.
580244
FLIGHT
They're in the middle of the align.
580245
CONTROL
Roger.
580246
FLIGHT
But remind me again in a minute, CONTROL.
580247
CONTROL
Okay.
580323
CAPCOM
Are we still awaiting the mark on BAT A?
580326
FLIGHT
I don't know. EECOM, how far away from BAT A?
580328
EECOM
FLIGHT, any time now, but the voltage is still up. We'll cue you.
580332
FLIGHT
Okay, well, I'm afraid it'll go fast, aren't you?
580335
EECOM
Well, we - it'll go pretty fast when it gets there.
580338
FLIGHT
CAPCOM, you primed Jack about BAT A, haven't you?
580342
CAPCOM
I told him we'd give him a mark on BAT A. He wanted to know what to watch for. He'll see the voltage drop but we'll give him the mark.
580348
Maroon EECOM
FLIGHT, EECOM.
580349
FLIGHT
Go ahead.
580350
Maroon EECOM
O₂ to N₂ ∆P is dropping; let's turn BATTERY A on.
  • The drop in nitrogen pressure, which was used to regulate differential pressures in the fuel cell, indicates the oxygen supply pressure is failing.
580352
FLIGHT
CAPCOM, BATTERY A on.
580358
FLIGHT
Tell him to hurry.
580400
FLIGHT
He got it. Good boy.
580409
FLIGHT
GUIDANCE, copy the numbers.
580414
FLIGHT
GUIDANCE, copy those numbers.
580416
GUIDO
Roger, FLIGHT.
580435
FLIGHT
You got BATTERY A on there, EECOM? 11 amps.
580437
EECOM
That's affirmative, FLIGHT. It's on.
580450
FLIGHT
GUIDANCE, FLIGHT.
580451
GUIDO
Go, FLIGHT.
580451
FLIGHT
Let me know when they're all done and you've got what you want in the LM, because I want to get that CSM powered down.
580456
GUIDO
Okay. We can't watch the LM, FLIGHT, we don't have the HIGH BIT RATE.
580459
FLIGHT
Okay, but from the voice.
580500
GUIDO
Okay. Roger.
580501
INCO
FLIGHT, INCO.
580502
FLIGHT
Go.
580503
INCO
We can get HIGH BIT RATE from the LM.
580507
FLIGHT
Does it cost me any power?
580508
INCO
No. We'd like for him to go to panel 12; we'd like to go FUNCTION switch to VOICE, and HIGH BIT RATE on PCM.
580515
FLIGHT
CAPCOM, got that?
580516
Maroon EECOM
INCO, EECOM. Meet me on number 1.
580517
CAPCOM
Say again, please?
580518
FLIGHT
They want to go to HIGH BIT RATE in the LM. Won't cost us any power. And they can tell a little more.
580541
CAPCOM
And, FLIGHT, we checking his arithmetic? On the -
580545
FLIGHT
GUIDANCE, arithmetic?
580548
GUIDO
Go, FLIGHT.
580549
FLIGHT
How's the arithmetic?
580552
GUIDO
Standby, we'll check it.
580558
Maroon EECOM
FLIGHT, EECOM.
580558
FLIGHT
Go.
580559
Maroon EECOM
If we can get LOW BIT RATE with the POWER AMPL off, let's turn the PRIMARY POWER AMPL off on the COMM system. There's no sense in -
580604
FLIGHT
INCO? Can we do that?
580606
INCO
Yes. Let's try it.
580607
FLIGHT
CSM POWER AMPL off?
580609
INCO
LOW BIT RATE. DOWN VOICE BACKUP.
580611
FLIGHT
You need him to do that?
580612
INCO
Yes.
580613
FLIGHT
Okay, CAPCOM. LOW BIT RATE. DOWN VOICE BACKUP, and POWER AMPL OFF in the CSM.
580620
CAPCOM
Okay.
580621
Maroon EECOM
INCO, EECOM. Meet me on number 1.
580626
TELMU
FLIGHT, TELMU.
580627
FLIGHT
Go.
580628
TELMU
We need to get the SUIT GAS DIVERTER to CABIN.
580630
FLIGHT
Yes.
580639
FLIGHT
CAPCOM, LM: SUIT GAS DIVERTER to CABIN.
580649
FLIGHT
GUIDANCE, how's that arithmetic?
580651
GUIDO
It looks good, FLIGHT.
  • Not nearly the snappy slide rule action seen in the film.
580652
FLIGHT
The arithmetic is go?
580654
GUIDO
Roger.
580655
FLIGHT
CAPCOM, the arithmetic's good.
580658
FLIGHT
Does that mean we've got an alignment now?
580700
GUIDO
A coarse align.
580701
Other GUIDO
We've got a coarse align, FLIGHT.
580702
FLIGHT
Okay. CAPCOM -
580710
FLIGHT
Okay.
580730
FLIGHT
As soon as we've got the alignment and we're finished with it we're going CMC OFF, IMU OFF, we'll leave the heater circuit breakers on powered from - BATTERY A. Until you tell me whether we need to keep them up or not.
580744
CAPCOM
How come we're getting so much noise on the COMM?
  • Again, an important question.
580747
FLIGHT
Don't know. INCO?
580750
INCO
We'd like them to do a COMMAND RESET on the CSM so we can get the LOW BIT RATE.
  • An answer to a completely different question.
580757
FLIGHT
I thought we just told them that.
580758
INCO
We did, but the way the commands work and everything -
580802
FLIGHT
Alright. They're in the middle of it, I'll give it to them in a minute.
580805
INCO
Okay.
580859
FLIGHT
We're turning off some more of the instrumentation, gentlemen.
580902
FLIGHT
GUIDANCE, have they got the fine align down to where you want it, yet?
580905
GUIDO
FLIGHT, we need him to read the angles to us. We've lost CSM data; we don't know what the CSM got on the 06 20.
  • VERB 06 NOUN 20
580913
FLIGHT
Okay, you really need that, huh?
580915
GUIDO
Right.
580915
FLIGHT
CAPCOM, they need a VERB 06 NOUN 20 on the CSM. We lost it.
580926
FLIGHT
Here they are.
  • Turns out, Jim is already on it.
580949
GUIDO
Copy, FLIGHT.
580950
FLIGHT
Yup.
581006
FLIGHT
You got everything you need, GUIDANCE?
581012
EECOM
FLIGHT, EECOM.
581012
FLIGHT
Go.
581013
EECOM
We're ready to go ahead and power down the CMC now.
581015
FLIGHT
Wait a minute. I want to be sure the guidance is alright.
581017
EECOM
Okay.
581027
FLIGHT
GUIDANCE, can one of you tell me if you've got everything you need?
581030
GUIDO
FLIGHT, GUIDANCE, we got everything.
581035
Other GUIDO
We're working on it now, FLIGHT.
581036
FLIGHT
Now - my question really is: when can I turn the CMC off? Are we that far enough through the procedure that we can turn it off? Yes or no, that's all I'm -
581045
GUIDO
Roger, FLIGHT. We are, FLIGHT.
581047
FLIGHT
You are.
581047
GUIDO
Right.
581048
FLIGHT
Okay.
581049
INCO
FLIGHT, INCO.
581050
FLIGHT
Go.
581050
INCO
If you get us that COMMAND RESET we'll get some data; we're blank here.
581053
FLIGHT
Okay. Well - in the CSM, you mean?
581055
INCO
That's affirmative.
581055
FLIGHT
We're turning it down anyway, right now, Ed.
581059
FLIGHT
CONTROL and GUIDANCE, one more time. You've got everything you need through to fine align and we can proceed to power down the IMU in the CSM, correct?
581105
GUIDO
That's affirmative, FLIGHT.
581106
CONTROL
That's affirmative, FLIGHT.
581107
FLIGHT
Okay, and we'll leave the heaters on. Heater power circuit breaker on in the CSM.
581110
CONTROL
Check LM LDG RDR heater breaker also.
581113
FLIGHT
Yeah. CAPCOM, for the CSM. We've got the fine align data and everything is set up so therefore we can start powering down the CMC and the IMU. For now leave the heater circuit breaker on, and the BATTERY A on the bus like it is. We're running that IMU heater to ground to see whether we need to leave that on or not. And here's the - paper -
581132
GNC
FLIGHT, GNC.
581133
EECOM
FLIGHT, EECOM.
581134
GNC
We got the go ahead to turn the heater power off.
581136
FLIGHT
Say again?
581137
GNC
IMU HEATER power to OFF.
581138
FLIGHT
And we'll still have it?
581140
GNC
That's right. We feel that we have a real good chance of bringing the platform up in good shape.
581143
FLIGHT
Now, do you want more time to debate it? I'm willing to give you 0.8 of an amp.
581147
GNC
I don't really know how much debate really needs to be done on that.
581150
EECOM
FLIGHT, EECOM. We need some data. We need to get the LOW BIT RATE - I think we need COMMAND RESET.
581157
FLIGHT
CS - CAPCOM, CSM COMMAND RESET, and then give them those instructions. We've got enough, we might as well save what we can on the battery now, and power down.
581205
CAPCOM
You want the CMC and IMU powered down?
581207
FLIGHT
Yup.
581208
CAPCOM
And heater circuit breaker - heaters off. Off on the -
581211
FLIGHT
And all the heaters, etc.
581213
EECOM
And COMMAND RESET.
581214
FLIGHT
And COMMAND RESET before they -
581216
CAPCOM
And you want BAT A, huh?
581217
FLIGHT
Yeah.
581304
TELMU
FLIGHT, TELMU.
581305
FLIGHT
Go.
581305
TELMU
Okay, we've been watching glycol temps and I guess we'd better go ahead and crank up the water boiler. This is Activation 20 - - Activation -
581316
FLIGHT
Listen. Listen.
581318
TELMU
And Activation 21 step 3.
581336
FLIGHT
Do you want to leave BATTERY A on? EECOM? Is that still the story? For how long?
581339
EECOM
That's affirmative, FLIGHT.
581340
FLIGHT
How long will you want to do that?
581342
EECOM
Until we get squared away with the LM.
581343
Maroon EECOM
FLIGHT, EECOM.
581343
FLIGHT
Okay.
581344
Maroon EECOM
All RCS AUTOs OFF, the 16 plus the 2 FDAIs OFF.
  • Overlooked is that between turning the CMC, IMU, and RCS all off, the spacecraft loses all attitude maintenance as the LM systems are not yet fully activated.
581348
FLIGHT
Yeah. Got that, CAPCOM?
581351
Maroon EECOM
I'll get it to him.
581352
FLIGHT
Alright.
581403
FLIGHT
Yeah. Before we turn his thrusters off in the CSM, CAPCOM, you'd better verify they've got some control in the LM.
581410
CONTROL
FLIGHT -
581410
FLIGHT
Plus, they need to bring up the water boiler. Go ahead, calling, FLIGHT.
581415
CONTROL
This is CONTROL. You mentioned them powering up the RCS; is that right?
581420
FLIGHT
Well -
581421
CONTROL
We're going to have to do that.
581423
FLIGHT
Yeah, okay.
581430
INCO
CSM data - CSM data, FLIGHT
581438
EECOM
FLIGHT, EECOM.
581438
FLIGHT
Go ahead.
581439
EECOM
Heaters, fans, O₂ TANK 1 off.
581442
FLIGHT
CAPCOM, all TANK 1 off.
581447
EECOM
FLIGHT, EECOM.
581447
FLIGHT
Go ahead.
581451
EECOM
Disregard, FLIGHT.
581452
FLIGHT
Yeah, have him go and get that stuff off.
581501
FLIGHT
Okay.
581509
FLIGHT
AUTO - all the AUTO RCS and the heaters in TANK 1.
581544
EECOM
FLIGHT, EECOM.
581545
FLIGHT
Go ahead.
581546
EECOM
They've got to get the power off when they can.
581548
FLIGHT
Yeah. Well, we just handed it to CAPCOM.
581605
TELMU
FLIGHT, TELMU.
581606
FLIGHT
Go ahead.
581606
TELMU
Okay, did you copy we need to crank up the glycol loop?
581610
FLIGHT
Yeah -
581610
TELMU
Activation 20.
581611
FLIGHT
Activation 20?
581613
TELMU
On the glycol loop activation. And Activation 21 step 3.
581620
FLIGHT
Down to step 3 or step 3 only?
581621
TELMU
No. Step 3 only.
581623
FLIGHT
Activation 20 and Activation 21 step 3 only.
581625
TELMU
That's affirmative.
581626
FLIGHT
Okay.
581648
FLIGHT
20 amps.
581706
FLIGHT
CAPCOM, FLIGHT. For the LM, he needs to get his sublimator up -
581712
FLIGHT
Yeah.
581715
EECOM
FLIGHT, EECOM.
581715
FLIGHT
Jack, the LM needs to get the sublimator up. Activation 20, and 21. For 21, step 3 only. Go ahead, EECOM.
581722
EECOM
You can go ahead and get those O₂ TANK 1 heaters off soon. That's a big chunk.
  • Of the 20 amps still being drawn.
581725
FLIGHT
Yeah, O₂ -
581728
CAPCOM
You want O₂ TANK heaters off -
581730
FLIGHT
Yeah.
581732
CAPCOM
Okay. And Activation 20 and 21 step 3.
581735
FLIGHT
Yup. Get the sublimator up.
581738
CONTROL
FLIGHT, CONTROL.
581739
FLIGHT
Go ahead.
581740
CONTROL
We need to get our RCS heaters on. Start those warming up. And get the RCS system pressurized, if we're going to be going out of CSM control here very shortly.
581751
FLIGHT
Yeah, we are.
581752
CONTROL
That needs to be taken care of before she goes.
581755
FLIGHT
Okay.
581801
TELMU
That's affirmative.
581825
FLIGHT
CAPCOM -
581826
EECOM
O₂ TANK 1 heaters and fans.
581828
FLIGHT
Yeah. O₂ TANK 1.
581833
FLIGHT
TANK 1.
581849
Maroon EECOM
FLIGHT, EECOM.
581850
FLIGHT
Go ahead - that was to the - that was for the CSM, that FDAI.
  • FLIGHT (incorrectly) thinks the crew misinterpreted the circuit breaker pull request as an instruction for the LM. In fact, the given abbreviated procedures never power up the LM FDAI in the first place.
581903
FLIGHT
And for the LM, CAPCOM, we need RCS heaters on, they need to pressurize the RCS to have control. And for the water sublimator, Activation 20 and 21 step 3.
581913
CAPCOM
Okay. I gave them 20 and 21 step 3 already -
581915
FLIGHT
Okay.
CAPCOM
- and you want RCS heaters on in -
581919
FLIGHT
Yeah, RCS pressurize - we didn't tell him to pull the FDAI in the LM.
581923
CAPCOM
No, that was the CSM.
581924
FLIGHT
Yeah. Does he understand that? Does that - Jim, does - has he -
581948
FLIGHT
CONTROL, do you want them to power the balls up and RCS?
581952
CONTROL
Definitely the RCS, FLIGHT.
581954
FLIGHT
Well, they need the ball to tell where they are.
581956
CONTROL
Roger.
581956
FLIGHT
CAPCOM, yeah, get a ball up in - one ball up and RCS heaters. And press.
  • Pressur[ize].
582001
CONTROL
And they need to have all of the circuit breakers in for the ISOL VALVES and the main SOVs, FLIGHT. On panels 11 and 16.
582009
FLIGHT
Okay.
582011
CAPCOM
Okay, in an orderly fashion, please. Ready. What you want, FLIGHT?
582015
FLIGHT
Okay, how's the CSM? Anything for the CSM?
582020
Maroon EECOM
FLIGHT, EECOM.
582020
FLIGHT
Go.
582021
Maroon EECOM
I think we're ready to power the main buses down. If everybody's ready.
582024
GUIDO
They don't have attitude control in the LM, FLIGHT.
582026
FLIGHT
Let's be sure we have control in the LM. Although he's probably out of jets right now. GNC, you got anything for the CSM?
582032
GNC
Negative, FLIGHT.
582033
FLIGHT
Okay, CAPCOM. For the LM, we think he ought to have an eight-ball, and we ought to get his RCS heaters on, his RCS pressurized, and he needs to get all his circuit breakers on 11 and 16 closed for control.
582044
CONTROL
Yeah, and Jack, what we're talking about is the QUAD HEATER breakers, the MAIN SOVs, and ISOL VALVE breakers on panels 11 and 16.
582053
CAPCOM
Don't you have an Activation page I can just tell them to turn to?
582057
CONTROL
Yeah, if you want to close all those dadgum breakers. On that page. And then he can go back and open them all up later, the ones he doesn't need. That's Activation 22 and 23.
582122
FLIGHT
EECOM, GNC, copy his question?
582125
EECOM
Negative, FLIGHT.
582128
FLIGHT
Jack wants to know how we wanted to proceed with the SCS. Go ahead, John.
582145
FLIGHT
CONTROL, FLIGHT, you giving us something for getting your RCS up?
582148
CONTROL
Yes sir, FLIGHT.
582149
FLIGHT
Hurry up, will you please?
582150
CONTROL
Yeah.
582151
FLIGHT
We've just got a lot of traffic for the CAPCOM.
582152
CONTROL
Wilco.
582217
GNC
Okay, FLIGHT, GNC. The CMC and the IMU are completely powered down at this time.
582221
FLIGHT
Okay.
582242
FLIGHT
Copy all that, CONTROL?
582243
CONTROL
FLIGHT, put the TCA breakers in last. The TCA breakers in last.
582248
FLIGHT
Okay. TCA breakers in last.
582307
FLIGHT
Yup. That works.
582308
CONTROL
Copy, FLIGHT.
582333
FLIGHT
Okay. CONTROL, do you understand the configuration we're getting into?
582337
CONTROL
Say again, FLIGHT?
582338
FLIGHT
Do you understand the configuration we're getting into?
582341
CONTROL
Right now, as I understand it, we're getting into a PGNS attitude control mode -
582345
FLIGHT
Okay -
CONTROL
- it'll be ATTITUDE HOLD.
582347
FLIGHT
Okay. My point is - let's be careful with what we're telling the CAPCOM to do here; try to give him as clear instructions by switches or Activation pages as we can, okay? Now -
582357
CONTROL
Okay, but the circuit breakers -
582358
FLIGHT
I know.
CONTROL
- are all botched together on these charts, FLIGHT -
582400
FLIGHT
I know. Okay, you're ready to power down the inverters, the BATTERY RELAY BUS, and you're ready to pull the entry battery off.
582407
Maroon EECOM
That's right. Now, that's not all completely configured to do it, but I think we've got to get off entry battery and then do it with voice, FLIGHT. Through the LM. COMM. That's going to kill COMM and everything.
582416
FLIGHT
Yeah. You're ready to do that. Is everybody ready to kill COMM in the CSM? GNC?
582421
GNC
Go, FLIGHT.
582422
FLIGHT
You ready to kill COMM in the CSM?
582423
GNC
Roger, FLIGHT.
582424
FLIGHT
GNC. GUIDANCE?
582427
GUIDO
Go, FLIGHT.
582429
FLIGHT
We're going to turn down the CSM.
582431
GUIDO
Roger.
582436
FLIGHT
Yeah; I want to be sure we've got control somewhere. I'm not satisfied we do yet. Attitude control.
582449
CAPCOM
FLIGHT, CAPCOM.
582450
FLIGHT
Go ahead.
582451
CAPCOM
Okay. We haven't got ourselves into a position here where we have no attitude control in either vehicle, have we?
582457
FLIGHT
I'm waiting to see when we get attitude control in the LM. Would they - would you ask them to call us when they have attitude control in the LM, and then we'll power the inverters, et cetera down in the CSM?
582507
CONTROL
FLIGHT, CONTROL.
582508
FLIGHT
Go ahead.
582508
CONTROL
Okay, once they get control established, we're going to do some setup work as far as loading the DAP to get his -
582512
FLIGHT
Oh, yeah, yeah. Okay.
582515
FLIGHT
I just want to get attitude control first.
582517
CONTROL
Roger. He's had to put his PGNS MODE control switch to ATT HOLD.
582521
FLIGHT
Oh yeah. Okay.
582538
FLIGHT (off loop)
Say again?
582546
CAPCOM
Hey FLIGHT, they don't have attitude control in the - we don't have CM/SM -
582550
FLIGHT
Yeah. Okay. Well, they're trying to get it up, right?
582554
CAPCOM
Yeah, they are.
582555
FLIGHT (off loop)
Okay. I just - what you want to know - pardon -
582615
CONTROL
FLIGHT, CONTROL.
582615
FLIGHT
Go.
582616
CONTROL
We're getting pretty close into gimbal lock, as I understand it. We need to get that RCS pressurized and on the line -
582621
FLIGHT
Yeah, well, they're on the way of doing it.
582629
FLIGHT (off loop)
He didn't have a ball to do it with.
582631
CONTROL
He's got the DSKY, FLIGHT.
582635
FLIGHT
No - who he? CSM or the LM?
582637
GUIDO
The LM.
582640
GNC
FLIGHT, GNC.
582641
FLIGHT
Go ahead - wait a minute, GNC. Yeah, we're having a control problem. What's the best way to get it; are you saying the LM, CAPCOM?
582649
FLIGHT
Alright.
582652
GUIDO
He can go DIRECT RCS, FLIGHT.
582653
FLIGHT
CAPCOM, have him go DIRECT RCS and hold attitude in the CSM.
582737
TELMU
FLIGHT, TELMU.
582738
FLIGHT
Can you wait a minute?
582740
TELMU
We're going to have to have AC here, for this.
582742
FLIGHT
For what?
582744
TELMU
For the balls.
582745
FLIGHT
CAPCOM, they need AC.
582800
TELMU
Both of them go in, FLIGHT.
  • LOGIC POWER
582806
FLIGHT
Did you copy, TELMU?
582807
TELMU
Roger, his LOGIC POWER breakers should be in. A and B.
582810
FLIGHT
A and B LOGIC should be in.
582840
CONTROL
RCS is pressurized.
582842
FLIGHT
Alright.
582846
TELMU
Okay, FLIGHT, we've got a procedure here for the AC coming at you.
582859
FLIGHT
CAP - he needs AC for the eight-ball - CAPCOM. We need to get AC powered up in the LM. I'm sure they know the procedure, but there it is.
582920
FLIGHT
TELMU, FLIGHT.
582921
TELMU
Go, FLIGHT.
582922
FLIGHT
What's our current level in the LM?
582924
TELMU
41 amps.
582926
TELMU
Okay, FLIGHT, TELMU.
582930
TELMU
FLIGHT, TELMU.
582931
FLIGHT
Go.
582932
TELMU
We show him still armed. We'd ask him to go MASTER ARM off.
582935
FLIGHT
Okay.
582959
TELMU
Okay, we've got AC, FLIGHT. Looks good.
583003
FLIGHT
Okay.
583015
TELMU
We see the pyros are disarmed now, FLIGHT.
583018
FLIGHT
Okay.
583048
FLIGHT
TELMU - er, CONTROL?
583050
CONTROL
Go ahead. I copy.
583052
FLIGHT
Do you want him to do that?
583053
CONTROL
The checkout? There's no need for it, FLIGHT. All we need to do is -
583057
CAPCOM
He wants to know if you want him to go down Activation 37.
583100
CONTROL
Negative.
583101
FLIGHT
Is he - has he got control now?
583104
CONTROL
Negative, he does not. I don't think he has his TCA breakers in yet.
583107
FLIGHT
Okay. But what do you want him to do?
583109
CONTROL
I want to get his TCA breakers in after he's got everything else configured, and then he can be in - he'll be in PGNCS ATTITUDE HOLD.
583116
FLIGHT
Okay, there's no -
583117
CONTROL
5 degree deadband.
583132
FLIGHT
Anything needs to be done in the DAP?
583134
CONTROL
Yeah, we're going to have to load the DAP, FLIGHT.
  • This trickle of piecemeal this-then-that is why FLIGHT indicated a preference for the prewritten procedures.
583136
FLIGHT
Well, do we want to be in PGNCS ATTITUDE HOLD? Before we load it? Come on, now -
583143
CONTROL
We've got the TCAs in now, and everything looks real good right now, FLIGHT. We can load the DAP with no problem.
583146
FLIGHT
Okay, what numbers you want them to put to get it?
583148
CONTROL
DAP data load is for - this configuration is for 30120.
583154
FLIGHT
30120.
583155
CONTROL
Right. And we'll have to give you some weights; we don't have those yet.
583204
FLIGHT
Approximately.
583214
FLIGHT
Do we need a weight to go in there?
583220
CAPCOM
What do we have on weight?
583222
CONTROL
CSM weight: 63400.
583224
FLIGHT
63400.
583225
CONTROL
That's CSM weight.
583225
FLIGHT
CSM.
583245
CAPCOM
Okay, are we ready to go to PGNCS ATTITUDE HOLD now?
583247
FLIGHT
CONTROL?
583248
CONTROL
Go ahead, FLIGHT.
583249
FLIGHT
You ready for PGNCS attitude control now?
583251
CONTROL
He's in P00 now, he - he's in ATTITUDE HOLD right now, FLIGHT.
583254
FLIGHT
Okay.
583258
CAPCOM
How about it?
583258
FLIGHT
Yeah.
583305
FLIGHT
Tell - be sure he tells Jack that.
583332
CONTROL
FLIGHT, CONTROL.
583333
FLIGHT
Go.
583333
CONTROL
Couldn't really copy - he may be having a problem firing his jets?
583337
FLIGHT
I don't know. I didn't hear.
583340
FLIGHT
He's asking if he's firing.
583342
CONTROL
Need to - make sure his ATCA (PGNS) circuit breaker is in.
583348
CAPCOM
Okay, what other control circuit breakers do you want in?
583350
FLIGHT
If he's having trouble, check his ATCA (PGNS) circuit breaker.
583353
CONTROL
ATCA (PGNS) breaker on panel 11, row 3.
583400
CAPCOM
ATCA (PGNS) and what else?
583401
CONTROL
And the ATTITUDE DIRECT control breaker - he's got that if he's got DIRECT right now.
583433
FLIGHT
Okay. That must have been what it was.
583435
CONTROL
That should have it.
583443
CAPCOM
Okay, can we check the switch configuration circuit breakers and the black boxes to make sure everything's configured correctly for attitude control?
583449
FLIGHT
Yeah. I'd like to be sure the LM is okay while we power the CSM down, now.
583501
FLIGHT
Okay.
583501
CAPCOM
Okay - yeah, I heard him holler up the tunnel.
583502
FLIGHT
Yeah. CONTROL, are you okay?
583504
CONTROL
Yeah, we've got one TCP switch firing -
583506
FLIGHT
Okay. But are you okay?
583508
CONTROL
Well, we look okay now, and we'll need another DSKY entry here very shortly to inhibit our upward-firing jets.
583513
FLIGHT
Alright. TELMU, are you okay?
583516
TELMU
Roger, FLIGHT, we're doing pretty good. I've got to get with you in a little while on -
583518
FLIGHT