Spacelog Apollo 13

Go ahead, Houston.

Jim, regarding your number 2 battery, we think that it's probably a sensor failure, a temperature sensor failure that's caused this alarm, rather than an actual overtemp of the battery; the reason being that we haven't seen any higher temperatures in the glycol loop. We expect to put the battery back on about 101 hours. That'll be about 10 minutes, and then we'll look at it some more there. Over.

Okay. Concerning number 2 battery, you think it might be a sensor failure because you haven't seen any changes, and you're going to put the battery back on the line in about 10 minutes.

That's affirm.

Houston, Aquarius.

Go ahead, Jim.

For information, Vance, about a half hour ago, I guess, Jack and I couldn't see constellations at certain spacecraft attitudes, stars. We could see the—Scorpio and Sagittarius and we could see Altair or Acrux and Alpha Centuri, Vega, stars of that magnitude, and our venting has stopped which allows us now to differentiate between the particles and the stars.

Roger; copy. Understand you can see the stars pretty well. Were you, at that time, in an attitude facing away from the Sun? I presume this is very attitude critical.

Yes. It is somewhat, Vance. If we have the Sun shining off the quads, it sort of ruins our vision; and also, if the Earth or the Moon are in the general field of view, we can't see anything.

Okay. Thank you.

Aquarius, Houston.

Go ahead, Vance.

Jim, we're ready to put that battery back on the line. Request you open the CROSS TIE BAL LOAD circuit breaker, panel 16, and then put back—BAT 2 back on the line.

Okay. First of all, we'll open the BALANCE CROSS TIE breaker on panel 16.

That's affirm.

Okay. The CROSS TIE BALANCE LOAD circuit breakers is in now, Vance. Now you want us to put battery 2 back on. Is that affirm?

Did you say it was in, or did you pull it out?

No. It's in; do you want it out?

That's affirm. We'd like it out, and then BAT 2 on the line.

Okay. Coming up. BAT 2 is on the line. We have a MASTER ALARM and a BATTERY light.

Aquarius, Houston.

Go ahead, Houston.

Jim, it looks to us like your battery is good, that this is in fact a sensor problem; therefore, request you close the CROSS TIE BAL LOADs on—circuit breaker on panel 16. Advise —

Okay.

— advise that you will not have any malfunction indication on any of your batteries now, but we can watch it from the ground. Over.

Okay. We'll close the CROSS TIE BALANCE LOAD circuit breaker at this time.

Roger. Copy.

That's closed, and we don't have any warning on any of the batteries, but you can monitor from the ground.

That's affirm.

And, Jim, we have a lengthy procedure here for powering up the CSM and turning on instrumentation so we can check the TM, and this will take a large piece of scratch paper whenever you're ready to copy.

This is to power up the CSM?

That's affirm.

Okay. I'll tell you what, I'll have Jack get configured. He can copy that down and I'll have him—we'll get the stuff. Stand by.

Okay.

Okay, Vance, how do you read the Aquarius?

Okay, read you loud and clear, Aquarius. Is it cool in there now?

Okay. On panel 3: TRANSPONDER to PRIMARY; POWER AMPLIFIER to PRIMARY; POWER AMPL, HIGH; MODE, VOICE, to OFF; POWER, SCE, to NORMAL; PMP to NORMAL; S-BAND ANTENNA, OMNI D, D as in Doggy.

Hey, very good. Okay, panel 225: circuit breaker FLIGHT BUS, MAIN B, to close; circuit breaker CTE, MAIN B, to close. Panel 250: CB BAT C BAT CHARGER/EDS 2 to close.

Hey, Vance, just a minute. Slow down, would you?

Okay.

Okay. I got distracted here. On panel 225: CB FLIGHT BUS, MAIN B, close; and then I lost you after that.

Okay. Let me give you all of panel 225 again. CB FLIGHT BUS, MAIN B, close; CB CTE, MAIN B, close. On panel 250: CB BAT—B BAT CHARGE, that should be BAT C, Charlie, isn't it? BAT CHARGE/EDS2 closed?

That's right. That's —

CB BAT B POWER ENTRY -

Okay. That should be BAT Charlie.

Let me finish. Okay. That's what I thought. BAT Charlie BAT CHARGE/EDS2, close; BAT Baker POWER ENTRY/POSTLANDING, closed. On panel 275: CB MAIN B, BAT BUS B, closed; CB INVERTER POWER 2, MAIN B, closed.

Okay. That's correct except for the second circuit breaker on panel 250, which is CB BAT Charlie POWER ENTRY slash POSTLANDING, close.

Okay. BAT Charlie POWER ENTRY/POSTLANDING.

Okay, now back to panel 250. CB BAT Bravo POWER ENTRY/POSTLANDING, close. Next, MDC 3, AC INVERTER 2 to MAIN B. AC INVERTER 2, AC BUS 1, on up. Next, panel 5: AC INVERTER AC BUS 1 to RESET and then center. Panel 3: UP TLM to COMMAND RESET then OFF. Then select best OMNI. Readback, please.

Okay, Vance. The following steps are sequence critical. Panel 250: CB BAT B POWER ENTRY/POSTLANDING, closed. That's BAT Baker. MDC 3, AC INVERTER 2, to MAIN B; AC INVERTER 2, AC1, on. …

How do you read now, Jack?

Okay, Vance. Did you—how far did you—did you copy any of my steps there?

Okay, I heard you through AC INVERTER 2, AC BUS 1 to on, and you were cut out by noise. Go ahead.

Okay, Now comes to one I didn't understand. You said go over to MDC 5 and A in—AC INVERTER, AC BUS 1, RESET, then center, and then back to MDC 3; UP TELEMETRY, COMMAND RESET then OFF, and then select best OMNI.

Roger. The readback's correct, but let me recheck that. Stand by.

Jack, we were incorrect on panel 5; that should have been panel 3.

Okay, that's good. I got it.

Okay. Now, when you're in this configuration, the following onboard readouts are required. Panel 3: BAT C voltage, PYRO BAT A voltage, PYRO BAT B voltage, SPS HELIUM PRESSURE. And the following readouts on panel 101: CM RCS injector temperatures, those are positions 5 Charlie, 5 Delta, 6 Alfa, 6 Bravo, 6 Charlie, 6 Delta; and the battery manifold pressure, which is 4 Alfa. And standing by for readback.

Okay. You want me to read out on MDC 3: BAT B voltage, PYRO A voltage, PYRO B voltage, SPS HELIUM PRESSURE. On panel 101: command module RCS injector temperatures; 5 Charlie, 5 Dog, 6 Alfa, 6 Baker, 6 Charlie, 6 Dog. The battery manifold pressure, 4 Alfa.

Okay. Now—that was correct but I want to re-check the very first one, that was BAT Charlie voltage. Is that what you read back?

Okay. Okay, BAT Charlie voltage. Seems like we're having a difference—I can't understand BAT Charlie from BAT Dog.

Okay. Now, that—that complete procedure for getting into it, as far as getting into it's concerned. What I will give you now is how to back out of it after you're through with your readings. Are you ready to copy?

Okay.

Okay. Now you'll back out fairly quickly after you go into this procedure. All we'll need is about 5 minutes of TM, and so if you're ready to copy, here it comes.

Go ahead.

Panel 3: POWER AMPL to OFF. Incidentally, copy this down on a piece of scratch paper as I read it, and then later I'll refer back to your first list where you can write things in the right-hand margin.

Okay.

Okay —

Go ahead. You want—Repeat the one on panel 3 again, Vance.

Okay. POWER AMPL, OFF.

Okay. Go ahead.

TRANSPONDER, OFF. AC INVERTER, 2, to OFF. Okay. Next, panel 250: CB BAT Bravo, POWER ENTRY/ POSTLANDING to open. Stand by 1.

Okay, Jack. What I just gave you now on the backout is the only thing that's order critical. From here on, you can go to the steps for initiating the procedure, and backtrack. In other words, you should go to each of the panels that I read up and put the circuit breakers back to the base-line configuration—or the switches. Over.

Okay, now here's—to accent, here's the sequence-critical sets: POWER AMPL, OFF; TRANSPONDER OFF; AC INVERTER, 2, OFF; and the last one on panel 250, CB BAT Baker POWER ENTRY/POSTLANDING, open; and then hit the steps in reverse order that you gave them to me, and back out, like then I would start on MDC 3 UP TELEMETRY, OFF—to OFF; and then AC INVERTER—AC1 BUS 1 to OFF; and then AC INVERTER, 2, OFF; AC INVERTER, 2, MAIN B to OFF. Is that the type of order that you want to back out of?

That's affirm, but—just for kicks, let's go through these panels again, and I'll give you the—the position, just to make sure there can be no doubt.

Okay. Go ahead.

Okay. And once again in the—in the area where I said order was not critical, it's still not critical when you back out. But now I'll go ahead. Okay, panel 4: TELCOMM, GROUP 1, AC1, it will not be AC1, it'll go to OFF. Panel 5: all circuit breakers on that panel which were positioned will now come to opened. Over.

Okay. Panel 4: TELCOMM, GROUP 1 will go OFF. Panel 5: all the circuit breakers that we closed will go back to open.

Okay. Panel 3: the first three lines have been taken care of already in my beginning in the backout procedure, so starting with MODE, VOICE, that should go back to VOICE. POWER, SCE, OFF; PMP, OFF; S-BAND ANTENNA, OMNI Bravo. Panel 225: CB FLIGHT BUS, MAIN B, open; CB CTE, MAIN B, open. Read back.

Okay, Vance. I'm going to have to switch OMNIs. I'm starting to get some static here.

Okay.

Okay. How do you read on AFT OMNI?

Loud and clear.