Spacelog Apollo 13

Okay, Jack. We'd like you to turn off your O₂ tank 2 heaters and fans. Correction—tank 1. Turn the fans and heaters off.

Okay. And, Jack, can we turn on the FDAI circuit breakers so we could have a ball to see if we go to gimbal lock or not?

Stand by.

Houston, he's going to give a 16 NOUN 20, Jack. And, okay, I've got O₂ heaters and fans off in tank 1.

And, Jack, let me know if you get close to gimbal lock, would you?

Jim, we don't want you to power down the ball in the LM. We wanted you to power down the ball in the CSM.

Jack, they haven't powered down —

Jack, we don't have the balls powered up in the LM.

I have the CMC and IMU in the command module is powered down. The heaters are out.

And the EVAP flow valve, that's open now, and I've undone my suit hoses here and opened up the suit flow valves; so, we got air flowing in the LM now.

Okay, Jack. Will you say again the SCS items you wanted me to power down?

Okay, Houston. Do you read Odyssey?

Hello, Houston. How do you read?

His gimbal lock and ours are different, Jim.

Apollo 13, Houston. Say again, please. You were cut out.

Okay, Jack. Do you want me to proceed by the SCS powerdown checklist? I did not copy the SCS items you wanted me to power down.

Okay, Odyssey. We want to go SCS ELECTRONICS POWER, OFF.

Okay. It's done.

FDAI POWER/GPI, OFF. AUTO jet SELECT, 16 —

That's done.

— OFF. And all your ROTATIONAL CONTROL POWER, OFF.

It's done. ROTATION CONTROL POWER, DIRECT, and AUTO …, OFF.

Okay, Jack. Tell me there. We need to know when we're getting close to gimbal lock in the LM. We have no balls right now.

Okay. We want you to power up your eight-ball. We want you to get your RCS heaters on. Pressurize the RCS and open up the MAIN SOVs. Over.

Okay, Jack. I got two commander FDAI breakers in, AC and DC, and the two GASTA breakers in AC and DC and next you'll want the RCS heaters all on with the—pressurize the RCS and then the MAIN SOVs open. And I think they're already open.

Roger. And, Fred-o, get the TCA breakers in last. Please.

Roger, Jim. I'm holding open those until you give me a further word anyway. I'm just going to pressurize right now.

Jack, are you reading LM gimbal angles?

— … power off, come down here and … the audio …

Okay, Aquarius. I have some gyro torquing angles and the Odyssey is powered down, attitude-control-wise, so LM's got attitude control now.

Aquarius, Houston.

Go ahead, Jack.

Okay. We want you to know that we got some gyro torquing angles for you. And we want you to tell us when you got attitude control in the LM.

Okay. We're still working on the pressurization. I'm getting Jim on the horn here so he can help out, there.

Roger.

Wonder why.

We got to get this pressurized.

Houston, Aquarius.

Stand by 1, Aquarius, Odyssey. We'd like you to go DIRECT RCS and hold your present attitude out the window until the LM gets RCS powered up. Go ahead, Jim.

Well, that's my question. We're not—Our 16 20 doesn't match our eight-ball here. We went to FDAIs ON, and we don't have our balls completely powered up. There may be a … and our angles don't look the same and we don't want to go into gimbal lock.

Roger. How far are you from RCS power up—RCS pressurization?

Okay, Jack. I'm right up to where it's MASTER ARM, ON; RCS, FIRE; —

…

— both LOGIC POWERs out … goes into normal circuit-breaker. … Do you want A in and then I'll fire them?

Okay, 13. You're both talking at once. One at a time, please.

Okay. Who's first?

Close LOGIC POWER A and B, Fred, and pressurize RCS.

Okay.

Go ahead, Odyssey.

Okay. I'm going to try to do the best I can. I've got a one-attitude reference I'm going to fly according to the lunar terminator.

Roger, Jack. Just maintain attitude.

What am I doing? I can't do that, anyway. Let's see, cross feed. Nope. Now, and -

Aquarius, Houston. We'll have to get some AC up so you can get a ball reading. Close your BUS TIE INVERTER circuit breakers, all four of them on panel 11. Close your AC BUS VOLT circuit breaker on panel 11. On panel 16, INVERTER 2, CLOSE. Select inverter 2. Over.

That's been completed, Jack.

Okay. The RCS is pressurized now.

Okay, Jack. Do you want us to proceed right on down the line with the RCS check-out and Activation 37 now?

Stand by, Fred.

Hell, is he still firing up there?

Okay, Fred. Negative on the activation on page 37. Go on to your RCS pressurize and then get your TCA breakers in and go to PGNS attitude hold.

Okay, Jack. How do you read?

Okay, Jim. This is Houston. We want you to load the DAP with 30120.

Load the DAP with 30120. Complete.

Okay. We need to change that CSM weight.

Okay, Aquarius. Your CSM weight is 63400.

And Jack's alive to take control the LM to stay away from gimbal lock. Over.

Affirmative. Take control of the LM. PGNS ATTITUDE HOLD.

We are.

And, Odyssey, request you coordinate with Aquarius on attitude control.

Okay.

Roger.