Spacelog Apollo 13

… But we're in this wobble.

Hey, Aquarius; Houston. How do you read me?

Aquarius, Houston. Okay. Go ahead.

Okay, Joe. It—Our wobble in this PTC has picked up where the Moon is running by pretty high in the window and the Earth pretty low; so I expect—On the side where the Moon's present, we're having a little bit of trouble with the COMM … breakout there in a couple of places.

Okay. Roger that, Fred.

… pressure gage as far as the noise … get the thing from the AFT. …

Houston, Aquarius.

Aquarius, Houston. Go.

Okay, Joe. I'm all set to copy that procedure for powering up the command module from the LM, whenever you want to give it to me. When did you, I guess you want to put battery A out of the CHARGE, huh?

Jack, we're not certain when the best time is to implement this procedure, and what we want to do at this time is read it up to you, so you'll have it and understand it and we'll—We'll be able to do it quickly when the time comes. And I don't have it for you quite yet. Over.

(Laughter) Okay. All right. I'll be standing by to copy it whenever you get it.

Okay, Jack.

Aquarius, Houston. Over.

Joe, I got to switch antennas here. Okay, Joe, I read you on the FORWARD antenna.

Okay, Jack, I have the procedure now to read up to you. Before I do, I want to mention something that will be of interest to Fred. We are looking at the SHe tank pressure rise and we expect it to blow. We don't know exactly what time it will go, somewhere around 105 hours or perhaps later than that. We've got plenty of blowdown capability. We just thought you ought to be informed.

Okay. Stand by. I'll tell him, now.

Okay.

Fred, they said they're looking at the SHe tank pressure rise, and they expect it to blow somewhere around 105 hours … Okay. Fred thought they did. …

Okay. Real fine. Are you ready for the procedure, now, Jack?

Yes. Joe, how long is it? Is it a big long one, or a short one, or a medium sized … about how many pages?

It's about—I'd say 15 to 20 steps, Jack. Some of it is LM stuff, and the rest of it is in CSM.

Okay. I got a fresh page here, and I'm ready to copy.

Okay. I'll give you the LM steps first. They have to be done first, and the first step is on panels 11 and 16, circuit breakers ASCENT CA, ASC ECA, two to close.

Okay. Panels 11 and 16 CBs ASCENT ECA to closed.

Okay. Next step: panels 11 and 16 CB ASCENT ECA CONTROL, two, to close. Over.

Okay. On 11 and 16 CBs ASCENT ECA CONTROLs to close.

Okay. That's correct. The next step is BAT 5 and 6 NORMAL FEED to high; those are switches.

Okay. BATs 5 and 6 NORMAL FEED, ON.

That's correct. Next step: BATs 1 and 3 to OFF slash RESET. Over.

BATs 1 and 3 to OFF slash RESET.

That's correct. Next step: wait 30 minutes for preconditioning.

Okay. That's wait 30 minutes for preconditioning.

That's correct, and the last LM step for now is BATs 2 and 4 to OFF/RESET.

Okay. BATs 2 and 4 to OFF/RESET.

That's correct. Now we'll go to the CSM, and the first step there is connect LM/CSM umbilical. Over.

Okay. Connect LM/CSM umbilical.

Okay. The next step, on panel 5, CB LM POWER-1 MAIN B and LM POWER-2 MAIN B, both, closed. Over.

Okay. On panel 5, CB LM POWER-1 MAIN B and 2 MAIN B, both, closed.

That's correct. On panel 5, CB EPS SENSOR SIGNAL MAIN B to close. Over.

EPS SENSOR SIGNAL MAIN B closed on panel 5.

That's correct. Next step, panel 250: CB BAT C POWER ENTRY/POSTLANDING; closed. Over.

Okay. On panel 250: CB BAT B POWER ENTRY/POSTLANDING, closed.

That's Charlie. Verify MAIN BUS voltage; then, LM POWER switch on panel 2 to CSM. Over.

Okay. That's verify the MAIN BUS voltage, and switch LM POWER to CSM.

That's correct. And then on panel 250, circuit breaker BAT B POWER ENTRY/POSTLANDING to open, and verify MAIN BUS B voltage.

Okay. Panel 250 BAT B POWER ENTRY/POSTLANDING, open, and then verify the MAIN BUS voltage.

Okay. That's correct. The last steps are to get the LM back on descent batteries. The first step is BATs 1, 2, 3, and 4, HI VOLTAGE, ON. Over.

Okay. Then the next step is a LM step, BATs 1, 2, 3, and 4, HI VOLTAGE, ON.

That's correct; and the last step in the LM, BATs 5 and 6 to OFF. Over.

Say again; you cut out there, Joe.

Okay, Jack. The last step in the LM, BATTERIES 5 and 6 to OFF. Over.

Okay. BATs 5 and 6 go OFF.

That's correct. That should configure you. Note that circuit-breaker protection on that circuit limits the available current to 15 amps. We think we can do quite a bit with it though. And the LM/CSM umbilical will be hot and MAIN BUS voltage may be monitored by selecting MAIN B on the gage. Over.

Okay. Real fine.

Good deal, Jack.

Okay. And I'll be ready to implement this whenever you call it up.

Roger that.

And how do you read, Joe?

Pretty good, Fred.

Okay. While Jack was on COMM, I was looking out the docking window here, and I could see another good shower of particles coming out of the service module. And the position this time appears to be on the other side. Before, we'd always seen them out of window 1, and where I'm looking at it from here, it looks like it'd be down below window 6 somewhere in the service module. Jack's going upstairs to see what it looks like up there.

Okay. Good deal. We copy that, Fred. And to show you how relaxed we are about the entry, Ken is looking at—giving you guys a chance to—prior to going into entry, PREP to snap a few pictures of the service module.

Ken is, huh? (Laughter)

Yes, he's got all that film up there, and he doesn't want to waste it.

Oh, I thought maybe you'd want me to do a PLSS EVA to go shoot pictures or something.

Okay, okay.

You're right; we got a lot of pictures.

I guess I agree it surely would be nice to document it someway if we can, but it doesn't look like …

Yes, we think it'd be a lot of help.

Joe, how do you read me?

Aquarius, Houston. Go ahead.

Okay. The condensate transfer worked great.

Stand by a minute, Fred. We're in a bad COMM mode.

Okay. How's that?

That's better.

Okay. The waste transfer into the condensate can works real well, Joe.

Okay. Good deal.

So, I guess we can keep FIDO happy with no overboard dumps.

Roger that.

Yes, that brings up one more possibility, Joe.

Say again, Fred.

Brings up another possibility. Now that we've got all of that stowed into the bags and the condensate can, we could probably blow all of that through the PLSS …, I wonder how the sublimator would work on waste water.

It might work if we had to do it, Fred. Right now we're looking at a comfortable excess of water through the sublimator. We were talking among ourselves this morning about having you try out the PLSS to ascent tank water-transfer situation and we decided not to do it, not to recommend it, because we figure it'd take us 30 hours to empty one of the ascent tanks, which you have to do in order to get PLSS water to it, and we'd rather use the descent water and we don't think we've gotten any sweat. Over.

Okay, Joe. I don't think there's any question about it from the plumbing standpoint that we could do that if we had to.

And, how do you read, Joe?

Read you pretty good, Fred. Go ahead.

I think our PTC wobble is growing worse. The Earth now is really up to the top of the window. I have to get way down almost to the floorboards to view it. Conversely, the Moon is way down at the bottom of the window.

Okay.

A lot more wobble.

Roger —

Far more wobble than I noticed on my previous watch.

Okay. Copied that, Fred. And our thermal people will be looking at it. One of the things we're talking about relative to the midcourse correction is we'd like not to do it before the SHe tank goes, if it's going to go, just so it won't give us a problem reestablishing PTC. And right now our people think that the burst disk will pop around 106 hours.