Spacelog Apollo 13

Okay, Joe. One thing I've noticed, that a couple of circuits there now—the pulse …—at least the number of them, is markedly decreased, and … rather bad and, apparently, that added venting we had out of the service module was some overboard relief valve, maybe letting go, because it appears to have stopped now.

Houston, Aquarius.

Aquarius, Houston. Go ahead.

What do you read down there for partial pressure CO₂?

Oh, let's see. We're reading 6.6 right now, Fred. What do you read?

I'm reading about 12.5. I guess we've got a gage problem … I did just get a MASTER ALARM and no caution light; we kind of figured that's what it was, with CO₂ approaching its limit. Maybe it didn't quite come out here.

Okay. Let me get a go, and I think it's time for us to go ahead and put these other canisters on. Stand by 1.

Okay. We went to 15 on the primary last night before I changed it and —

Roger that, Fred. We wanted to —

— I don't have a steady—I don't have a steady ECS light on at this time, Joe, so it must have just been a momentary.

Okay. We know when you went to 15 last night on primary. We want to switch out today at 7.6. Let me check and see if we're ready.

Okay.

Yes. That's what it is, Joe. I've got something going on this alarm … ECS light.

Fred, Houston. The COMM isn't too sharp and I didn't copy.

Okay, Aquarius; Houston —

Houston, Aquarius. How do you read?

— Why don't you try it now? You're loud and clear now, Fred.

Okay. I was just—I'm getting MASTER ALARMS every few seconds and I am catching a glimmer now of the ECS light. For the time being, I have …—… open. Okay, now we got the ECS light on steady.

Okay. Copy that. You have the MASTER ALARM, with the ECS light. We are ready to go ahead and get you on the command module canisters. And as the first step, I'd like to know whether you've inserted the commander's red hose to the second canister bag. Over.

Okay. Yes. Sure enough; the commander's red hose is inserted into the canister bag.

Okay, Fred. The next thing I'd like you to do is to take some more gray tape and tape over half the outlet area of each of the blue nozzles; the commander's and the LMP's. The reason we're doing this is we're going to be running this loop through the secondary LiOH canister hole with the canister removed, and we don't have the flow restriction we need to keep the separator from overspeeding. Over.

Okay. Yes, that's right. So we want to tape over half of the—both the blue and the red commander hoses. Is that right?

Negative, Fred. That's half of the commander's blue hose and half of the LMP's blue hose—the outlet hoses.

Oh, okay. I'll tape over half of each of the outlets. Stand by.

Okay. I'm going to turn off one suit flow valve at a time while I am doing the taping, Joe.

Say again, please, Fred.

Okay, while I'm doing the taping, I'll have that particular suit flow valve in the suit DISCONNECT position momentarily.

Okay. How do you read now, Joe?

Okay, Fred. Reasonable COMM. Are you ready for the next step? Over.

Okay. One correction—the red hose that's connected up right now to the lithium cartridge in the LMP's—Wait a minute.

Okay, Fred. Understand only the LMP's red hose is actually plugged into the canister bag. In that case, we would like you to follow the procedure for inserting the other red hose in the other canister bag as follows: you cut a diagonal hole in one corner of the bag. Look at the other bag and see how it was done. Stick the hose in about 6 inches. Try to get the outlet nozzle down if you can, or else sideways, and then just tape up the hose to the bag to make a nice tight seal. Over.

Okay. Jack's back in here. I guess he can do that. Stand by.

Okay.

How do you read, Joe?

Okay, Fred. Is that done? Over.

Okay. I'm going to tell you where they are. They're both situated, as you say, with the bottom of the canister exposed to free air, and one is sitting right by the—the LMP's is sitting right by the EPS panel, and the CDR's is up in the tunnel.

Jack, Houston. The COMM got real noisy there, and I didn't copy that. Stand by a moment.

Okay, Joe. How do you read now?

Okay. That's real good, Jack; go ahead.

Okay. The canisters are situated as you—as you would like with the bottom of the canister exposed to free air.

Okay.

The position of the LMP's canister—The LMP's canister is sitting on the EPS panel now, and the CDR's canister is positioned up in the tunnel.

Okay. Real fine, Jack. The next step is to physically separate both blue hoses a good distance away from the canister so that we don't short circuit the flow, and tape them in place; and the ideal location for them would be up in the tunnel so as to get some flow into the command module. Over.

Both hoses in the—up into the command module?

Oh, you can use your judgment on that, Jack. We'd like at least one, and the recommendation that I got was to put them both up in the tunnel.

Okay. We have the LMP's blue hose up by the LMP's window and the—Of course, the red hose is separated by some 4 feet. And the—Okay. We're going to—and the other hose—the—has the extension on it—The CDR's blue hose, of course, has the extension on it, and it's blowing way up in the command module. And the red hose is about—Oh, it's right at the docking ring where the blue latches are, so there's about 4 or 5 feet difference from there, too. Is this satisfactory?

Okay, Jack. That sounds satisfactory. The next steps are—are suit-loop configuration steps, and the first one is to —

Okay. SUIT DIV —

— is to place the SUIT DIVERTER valve to the PULL EGRESS position.

Okay. SUIT DIVERTER valve to PULL EGRESS.

That's affirmative —

That's done —

Okay. The next step is CABIN GAS RETURN to EGRESS. Over.

…

Okay, Jack. Did you copy CABIN GAS RETURN to EGRESS? Over.

No, I didn't get that, Joe. CABIN GAS RETURN to EGRESS.

That's correct.

Okay. That's done.

Okay. Next, SUIT CIRCUIT RELIEF to CLOSE. Over.

SUIT CIRCUIT RELIEF to CLOSE.

Roger.

Okay. I got that done.

Okay. And the last step is select secondary CO₂ canister. We'll let it flow through the empty hole, and let's see how we do.

Select secondary CO₂ canister.

Roger, Jack. That completes that procedure, and the next thing I've got for you is a procedure for going back into the command module and powering up the main buses temporarily using the BUS TIE switches. We want to do this for two reasons: first of all, we want it absolutely verified that there are no loads on the main buses, that we've got everything off and that the buses look good; and the second thing we want to do is to power the bus—the main buses, with the BUS TIE motor switches, and then depower them by pulling the circuit breakers, leaving the MAIN BUS TIE switches in the on position, just to assure that they'll be there when we need them, whether the batteries get cold or not. Over.

Okay, Joe. How you read?

Better now, Jack. Satisfactory. Did you copy my rationale for the main bus powerup?

Yes, I did. You want to remove—You want to power up both buses, with the BUS TIE motor switches; first of all, to see that there are no loads on the buses, and second, and then depower the buses by pulling the circuit breakers to insure that the motor switches don't—that the BUS TIES stay on so that they're there when we need them.

That's correct, Jack. Are you ready to copy the procedure?

Okay. Go ahead.

Okay. As the first step, I have one change to the basic configuration that we gave you, and it's two more circuit breakers that we want open. On panel 225—Are you ready to write that down? Over.

Yes. I'm all ready, Joe. Go ahead.

Joe, I'm all ready. Go ahead.

Okay. On panel 225, we want the RENDEZVOUS TRANSPONDER FLIGHT BUS circuit breaker open, and the S-BAND FM TRANSMITTER/DSE FLIGHT BUS circuit breaker open. Over.

Okay. TV RENDEZVOUS TRANSPONDER FLIGHT BUS, open; TV S-BAND TRANSMITTER/DSE FLIGHT BUS open on panel 225.