Spacelog Apollo 13

We just wanted you to open the circuit on fuel cell 1.

13, Houston. We see you getting close to gimbal lock there. We'd like you to bring up all quad Cs on MAIN A, quad C-1, C-2, C-3, C-4 on MAIN A, and also bring B-3 and B-4 up on MAIN A.

13, Houston. Do you read?

Yes. We got it.

Affirm.

Okay. Can you tell us anything about the venting, where it is coming from, what window you see it at.

It's coming out of window 1, right now, Jack, and could you give me the thrusters again?

Okay, the thrusters —

What buses?

We'd like—on MAIN A, we'd like Charlie 1, 2, 3, and 4. Also Bravo 3 and 4 on MAIN A.

Okay. Got it.

13, we need OMNI Bravo.

OMNI Bravo.

Okay, 13; this is Houston. We'd like you to go to your G&C checklist, the pink pages, 1-5. Do powerdown until we get a Delta of 10 amps. Over.

All right. Roger.

Okay, Jack, say again that—… for the powerdown; it's not in the pink pages, the 1-5.

Okay. We'd like you to go down that powerdown procedure until you get a Delta of 10 amps. Over.

Roger. …

13, Houston. Did you copy our powerdown request?

Roger, Jack. We're—yes, we're doing it right now.

Where did you say that was located, Jack?

That's in your systems checklist, page 1-5.

And, 13, you might also check for those pages in your launch checklist. They're emergency pages; pink pages, 1-5, and we'd like you to power down until you get —

Okay. That was in the launch checklist, Jack.

Roger. Power down until you get an amperage of 10 amps less than what you got now. Over.

Okay. Jack. Are you happy with the amps we have now?

Stand by 1, Fred.

Okay, Jack, and on this page 1-5, we proceeded right down the list, all the way down; we're right now at BMAG number 2 is in WARM UP.

Roger. We copy BMAG 2 in WARM UP. We'll follow you through.

Okay, and something is giving us a reach, Jack, both in pitch and roll, so I'm suspecting that maybe it's whatever it is that's venting back there. I've had to use DIRECT in order to stabilize this, and as soon as I do, we're starting to pick up rates again. Can you pick up any jets firing?

Stand by. What direction are your rates in, Jack?

It's negative pitch and negative roll.

Roger.

13, Houston. We need to get some more instrumentation up. We'd like you to put INVERTER 1 on both AC BUSES. Over.

Okay. Okay, you got INVERTER 1 on both AC BUSES now. And Jack, one of the items that we turned off was the—all the fuel cell pumps. Okay, and you might let us know when fuel cell 2 needs its pump back; we ought to take care of that guy.

Roger. Okay, Fred, we want FUEL CELL 2 PUMPS to AC1, please.

FUEL CELL 2 to AC1. Roger.

Okay, it's on AC1.

OMNI Charlie, please, 13.

OMNI Charlie.

13, this is Houston. We'd like to power down just a little bit more, so let's get BMAG 2 OFF; and make sure your lights are down. Over.

Okay. The lights are down, and BMAG 2's going from STANDBY to OFF.

13, Houston —

Okay, Jack, now I've got a rate -

— we'd like you to open circuit fuel cell 3.

Open circuit fuel cell 3.

Go ahead, Jack.

Okay, fuel cell 3 is off the line now.

And 13, Houston. We'd like you to turn all your Bravo thrusters OFF; and put all your Delta thrusters on MAIN A, please.

All Delta thrusters on MAIN A and all Bravo thrusters OFF. Roger.

13, Houston. Turn BATTERY A OFF —

Okay, Jack, …

…

That's right; we were pulling current all the time.

BATTERY A OFF. Roger.

Now you're … up.

I'm transmitting. I don't have any current now.

Hey, it's off—it's off. They—they killed the bus completely now.

13, Houston. We'd like you to isolate your O₂ surge tank. Over.

Surge tank off now, Jack? Okay, Jack, are you copying—O₂ tank 1 cryo pressure?

That's affirmative. And we're trying to get power to that tank. Stand by; we're working on it.

Okay.

Okay. We had a—SERVICE MODULE RCS B light, jack, due to package temperature.

SERVICE MODULE RCS B. We copy. No problem.

Let's read you the lights we got on now; CRYO PRESS, FUEL CELL 1, FUEL CELL 3, MAIN BUS B UNDERVOLT, SUIT COMPRESSOR.

Roger, we copy them and we'd like to build up the pressure in O₂ tank 1, so turn the heaters on manually; we'll watch the pressure for you.

Okay, do you want to see —

Go ahead.

— We're going to get a MAIN BUS A UNDERVOLT, probably.

Roger. We realize that; we feel we can stand 5 more amps on it.

Okay.

Okay, heater on tank 1's ON.

13, Houston. We'd like you to additionally bring on the fans in O₂ tank 1, and we can stand the additional amperage on that.

13, Houston. We'd like you to check some circuit breakers on panel 226. CRYO O₂ HEATER number 1 MAIN A, and check the three CRYO FAN MOTORS, TANK 1, three phases.

Okay, Jack. 226 is configured just like it should be. I got three REACS breakers and three RAD breakers open. All the rest are closed.

Okay, Fred. Thank you.

Jack, looking outside, the number of particles has diminished greatly, almost ceased now, which indicates maybe what was venting has almost stopped.

Roger, Jack. Thank you. We copy.

I'm still getting some rates in negative pitch, though.

Roger.

And, 13, we'd like to verify that both BMAGs are off, please.

Negative. We just have one BMAG. BMAG number 1 is still on.

Okay, Jack. Let's take BMAG 1 off.

Okay. BMAG number 1 off now.

13, this is Houston. We'd like you to give us a survey of your displays on MDCs 1 and 2. Give us gage readings and talkbacks. Over.

Okay. We'll start with display number 1.

Okay, Jack. On MDC 1, there's nothing abnormal. All the rate indicators are zero. Ball number 2 is frozen, of course; we lost MAIN B. I've got—Ball number 1 appears to be working normally. Right now I'm sitting at roll 0, pitch 180, and yaw about 13 degrees. I'm going to try and hold 0, 180, and 0.