Jack Swigert (CMP): Okay, Houston, we've had a problem here.

Jack Lousma (CAPCOM): This is Houston. Say again, please.

Jim Lovell (CDR): Houston, we've had a problem. We've had a MAIN B BUS UNDERVOLT.

Jack Lousma (CAPCOM): Roger. MAIN B UNDERVOLT.

Jack Lousma (CAPCOM): Okay, stand by, 13. We're looking at it.

Fred Haise (LMP): Okay. Right now, Houston, the voltage is—is looking good. And we had a pretty large bang associated with the CAUTION AND WARNING there. And as I recall, MAIN B was the one that had had an amp spike on it once before.

Jack Lousma (CAPCOM): Roger, Fred.

Fred Haise (LMP): In the interim here, we're starting to go ahead and button up the tunnel again.

Jack Lousma (CAPCOM): Roger.

Fred Haise (LMP): Yes. That jolt must have rocked the sensor on—see now—O2 QUANTITY 2. It—was oscillating down around 20 to 60 percent. Now it's fullscale high again.

Jack Lousma (CAPCOM): Roger.

Jim Lovell (CDR): And, Houston, we had a RESTART on our computer and we had a PGNCS light and the RESTART RESET.

Jack Lousma (CAPCOM): Roger. RESTART and a PGNCS light. RESET on a PGNCS, RESET —

Jim Lovell (CDR): Okay. And we're looking at our S—SERVICE MODULE RCS HELIUM 1. We have—B is barber poled and D is barber poled, HELIUM 2, D is barber pole, and SECONDARY PROPELLANTS, I have A and C barber pole. BMAG temperatures?

Fred Haise (LMP): Okay, AC 2 is showing zip. I'm going to try to reconfigure on that, Jack.

Jack Lousma (CAPCOM): Roger.

Fred Haise (LMP): Yes. We got a MAIN BUS A UNDERVOLT now, too, showing.

Jack Lousma (CAPCOM): MAIN A UNDERVOLT.

Fred Haise (LMP): It's reading about 25-1/2, MAIN B is reading zip right now.

Jim Lovell (CDR): And, Houston, Odyssey.

Jack Lousma (CAPCOM): Stand by 1, Jim.

Jack Lousma (CAPCOM): 13, Houston. We'd like you to attempt to reconnect fuel cell 1 to MAIN A and fuel cell 3 to MAIN B. Verify that quad Delta is open.

Fred Haise (LMP): Okay, Houston. I'm showing—I tried to reset and fuel cell 1 and 3 are both showing gray flags, but they are both showing zip on the flows.

Jack Lousma (CAPCOM): We copy.

Jack Lousma (CAPCOM): 13, Houston. We'd like you to open circuit fuel cell 1; leave 2 and 3 as is.

Fred Haise (LMP): Okay. I'll get to work on that.

Jim Lovell (CDR): Houston, we've had a problem.

Jim Lovell (CDR): That's AC, okay. Yes, that's good AC and it looks to me, looking out the hatch, that we are venting something. We are venting something out into the—into space.

Jack Lousma (CAPCOM): Roger. We copy your venting

Jack Swigert (CMP): Okay, Houston, we've had a problem here.

Jack Lousma (CAPCOM): This is Houston. Say again, please.

Jim Lovell (CDR): Houston, we've had a problem. We've had a MAIN B BUS UNDERVOLT.

Jack Lousma (CAPCOM): Roger. MAIN B UNDERVOLT.

Jack Lousma (CAPCOM): Okay, stand by, 13. We're looking at it.

Fred Haise (LMP): Okay. Right now, Houston, the voltage is—is looking good. And we had a pretty large bang associated with the CAUTION AND WARNING there. And as I recall, MAIN B was the one that had had an amp spike on it once before.

Jack Lousma (CAPCOM): Roger, Fred.

Fred Haise (LMP): In the interim here, we're starting to go ahead and button up the tunnel again.

Jack Lousma (CAPCOM): Roger.