Spacelog Apollo 13

Go ahead.

Jim, we have some status information for you, if you're ready to copy on a piece of scratch paper.

Stand by, Vance.

Okay.

We're ready for you.

Put that away and get some status paper here.

Go ahead, Vance.

Okay. First, midcourse correction will probably be at GET 104 hours, and all we look for is a 4- to 6-feet-per-second DELTA-V. Okay. That's the first item. Now, I will give you a rundown on consumables. Okay. In the LM, you have 1498—that is 1 4 9 8 amp-hours remaining. That means over 61 hours you'd—That would average out to 24.5 amps. We expect that, after powerdown, that you will use 1 4 or 14 amps per hour, and that would leave a reserve of 500 amp-hours at the end of the mission. Are you with me?

Roger. We're with you.

I saved my—number was yesterday.

Okay. In the LM, you have —

We're with you.

Roger. In the LM, you have 215, that is 2 1 5, pounds of water, usable. That would average out over 61 hours to 3.5 pounds per hour available. Okay.

Okay. And after you power down, we expect that you will be using water at the rate of 3.2 to 2.7 pounds—That's at 14 amps per hour electrical usage rate. One note, this does not—When we speak here of water available, this does not include CSM water and PLSS water, so that's add on. Okay, next, LiOH. Using the CSM cans, you will have 16 cans at 12 hours per can to give you 1 9 2, or 192 hours, of LiOH. And, in the LM, using its cans, you have 44 hours remaining.

Vance, is that with the PLSS secondaries?

That's affirm. That's affirm. That includes PLSS secondaries.

Okay; oxygen. You have remaining 44 pounds in the LM. At a usage rate of 0.36 pounds per hour, that leaves you 120, or 1 2 0, hours of oxygen. Okay. Next, RCS. RCS A stands at 6 2 percent and B at 6 2 percent. We only expect 2 percent to be used for the PTC, so you're in good shape for RCS. Next, DPS DELTA-V. You have 1190 feet per second remaining. And, finally, CSM EPS. We estimate that you have 99 amp-hours. That's an estimate. And that's it. Over.

Okay. I copy.

Okay. And just a question. It would be interesting to hear from Jack to see if he thinks that main B bus is good. If he has any idea of how, if whether it's good or not, this would influence our steps in the future; for example, we might want to try to test main B to see if it is, in fact, good so that we'd know how to set switches for entry.

Roger. Just a minute. They want to know whether you think main bus B is any good for the command module.

Vance, while Jack's got on the loop, let me pose the question of how we're planning on doing this midcourse, if we are going to power down the PGNS.

Would you stand by on that, Jim? We'd like to give you a procedure for that later on.

Okay. Got a midcourse at 104 hours, he's going to give us a procedure for that later on.

In short, Jim, we don't expect any problem, but we'll explain further later on.

Okay.

Deke says get a night's sleep. He says you've been working hard, and you ought to relax a little bit and be ready for tomorrow.

Vance, this is Jack.

Go ahead, Jack.

Okay. Let me give you my observations on main bus B. Things happened pretty fast there, and we first heard the impact or explosion or whatever caused it, I'm not sure. The next—About 1 second later, there was a MASTER ALARM which was the MAIN BUS B UNDERVOLT. I looked at the voltage, and the voltage was good at this time so I'm suspecting it was a spike. Fuel cell 3 was also good, with good flow. However, Fred, at that point, was coming into the command module and got over into his seat. At that time, we shortly had an AC BUS 2 light about the time he got into his seat. He looked at the MAIN BUS B and the MAIN BUS B was reading ZERO. It, however,—and the fuel cell flows were ZERO. I'm kind of suspecting that perhaps we do have a MAIN—a current MAIN BUS B. But that's merely a guess. I never did try to reset it. We were having other problems with the MAIN BUS A, having an UNDERVOLT and a few other things like that. I'd kind of like to hear what your feelings are down there.

Well, Jack, we copy your information. And we'd like to hold off because we're still working the problem. So we'll have to give you information later.

Thank you.

Aquarius, request AFT OMNI.

Vance, are you back with me?

Roger. We're with you.

Okay. We lost lock there. We switched OMNIs. Just for my own—kind of to get my thoughts in order, I'd kind of hear what—I'd like to hear what kind of entry you're planning. EMS or PGNS or what ?

Okay. PGNS entry is being planned, and people are at work on checklist changes and that sort of thing.

Okay. Real fine.

And—we'll—We'll give you the CSM stuff tomorrow, but basically we expect that main bus B is good and we're going to work up a procedure to test it.

Okay. Those are my thoughts, too.

But —

You think main bus B is good, don't you?

That's affirm.. We think it is, but we want to check it out anyway. We think you guys are in great shape all the way around. Why don't you quit worrying, and go to sleep.

Oh, that—That's our boss, Deke.

Well, I think we just might do that—or part of us will.

I mixed up. How many more of those—Are we hot mike? —

Yes.

You only got two … there, so …

I will.

You wouldn't believe it, but I'm now in command of the LM. Okay. Vance, I'm probably the only CMP that's ever witnessed a DPS burn sitting on the ascent engine head.

Did you get some? Is there any coming out still? They didn't answer. I think we made it. How's this working out?

Okay. No problem.

They are, huh? How are we going to get an alinement?

We'll pull one out someways, I guess. We've gotta watch that one right there.

It's decreasing now. It'll—it'll—It's cold. I noticed that in the command module. It'll wobble.

Houston, Aquarius.

Switch OMNIs to TRANSMIT.

Houston, Aquarius.

Go ahead, Aquarius.

Roger. Are you planned to set up here very shortly—a powerdown procedure?

That's affirmative, if you'll take out your contingency book and turn to page Power 6. Over.

Roger. Stand by. Contingency Power 6. Get the book over here. Contingency Power 6.

Well, I hope this …

And while you're doing that, let's put ATTITUDE CONTROL, three, switches to MODE CONTROL.

All three ATTITUDE CONTROL switches have been in MODE CONTROL.

Okay. And when you get to Power 6, you ought to see a circuit breaker page, panel 11.

Have a pencil? Let's see it—thank you.

Okay. I have Power 6, panel 11.

Okay. On Power 6, panel 11—The top three rows, configure them as you see them.

Okay, now, Jack … We have put the TCAs in for the previous procedure. Do you want those out, now?

That's affirmative, Jim, Pull them out. TCAs open.

Okay. I'm changing those to … back again. First three rows. And you're pulling the ATCA PGNS, huh?

That's affirmative. Pull ATCA PGNS open.

Okay. I've done that.

Okay. Are you ready for the fourth row?

Affirm.

Okay. Now when we get in the fourth row, we're going to open the IMU OPERATE circuit breaker; and what that means is that we're going to lose the capability to watch your CDUs, so we're not going to be able to see your attitude. Therefore, we will not be able to advise you on which antenna to select for communications. The way we want you to handle that is to turn the LM UPLINK SQUELCH off, and when you hear the noise, switch antennas. We'll be able to see you switch antennas, and it's going to take us about 3 to 5 minutes to establish a lockon again after you switch. After each time that you switch antennas, we will initiate a voice check. And basically when you see the Earth out the window, you can be on FORWARD antenna, and when the Moon's up in the window use the AFT antenna. You copy?

Okay. We're going to pull the IMU OPERATE circuit breaker, so you won't be able to see our attitude. Therefore, you won't tell us how to switch antennas and we'll enable the—I will turn the—up the SQUELCH OFF so that when we start getting any static, we'll switch antennas and as a thumb rule we could use—with the Earth forward, we use the FORWARD antenna and when we see the Moon we use the AFT antenna.

That's affirmative, Jim. In other words, we're leaving the antenna switching up to you, and after you switch antennas it's going to take 3 to 5 minutes for us to establish a lockon again, and we'll initiate a voice check. And I'm ready to go on panel 11, row 4.

Okay.

Okay. On row 14, under HEATERS RCS SYSTEM A/B-1: open QUAD 1 through 4; under ECS, the only change is—under GLYCOL PUMP close AUTO TRANSFER; under COMM, the only change is: open VHF A RECEIVER, open COMMANDER AUDIO; under PGNS, the only change is: close and leave closed IMU STANDBY circuit breaker, so we can have heaters. Read back.

Okay. On row 4, we're going to open all four of the heaters—the RCS SYSTEM A and B—the first four circuit breakers. We're going to close the AUTO TRANSFER. We're going to open the VHF A RECEIVER and the COMMANDER AUDIO. And we're going to close the IMU STANDBY. The LGC DSKY and the IMU OPERATE will be open.

That's affirmative, Jim. All other breakers in that row are as you see them in the checklist. And on row 5, the only change is that we want you to, under EPS, open ASCENT ECA CONTROL. Over.

Roger. I think we already have that opened—ASCENT ECA CONTROL is probably already open.

Okay. So let me confirm. We'll have one COMM system, that will be the LMP system, and we'll have to do our own antenna switching; therefore, we'll have to wait about—Okay, why don't you switch? Aft antenna.

We'll have to wait for you to get a lockon again. Is that correct?

That's affirmative, Jim. You'll be working off of the LMP's panel over there.

Okay. What else do you have for me?

Okay. Panel 16, that's on page Power-7. Top row, the only change is: under RCS SYSTEM B, open PQGS/DISPLAYS. Over.

Okay. I may go over this with you, Jack, because this checklist has been written over two or three times now on our various procedures. Top row, the first two are open, the next three are closed, and we're going to open now the QUAD TCA's 1, 2, 3, 4; CROSSFEED will be closed, and the TEMP/PRESS DISPLAYFLAG will be opened, and we're going to open up the PQCS, MAIN SOV will be closed, and the … will be opened.

That's affirmative, Jim. And there's no change to the second row. Over.

Okay. Again let me go through this with you. The first four are going to be closed. The next sev—eight will be—the next nine will be open from LOGIC POWER B through DESCENT ENGINE OVERRIDE How about the CWEA? Is that going to be closed?

That's affirmative, Jim. We want the next five closed.

Okay.