55:55:20 — Swigert: "Okay, Houston, we've had a problem here."

55:55:28 — Lousma: "This is Houston. Say again please."

55:55:35 — Lovell: "Houston, we've had a problem. We've had a main B bus undervolt."

55:55:42 — Lousma: "Roger. Main B undervolt."

55:55:49 — Oxygen tank No. 2 temperature begins steady drop lasting 59 seconds indicating a failed sensor.

55:56:10 — Haise: "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 an amp spike on it once before.

55:56:30 — Lousma: "Roger, Fred."

55:56:38 — Oxygen tank No. 2 quantity becomes erratic for 69 seconds before assuming an off-scale low state, indicating a failed sensor.

55:56:54 — Haise: "In the interim here, we're starting to go ahead and button up the tunnel again."

55:57:04 — Haise: "That jolt must have rocked the sensor on — see now — oxygen quantity 2. It was oscillating down around 20 to 60 percent. Now it's full-scale high."

55:57:39 — Master caution and warning triggered by DC main bus B undervoltage. Alarm is turned off in 6 seconds.

55:57:40 — DC main bus B drops below 26.25 volts and continues to fall rapidly.

55:57:44 — Lovell: "Okay. And we're looking at our 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." AC bus fails within 2 seconds.

55:57:45 — Fuel cell 3 fails.

55:57:59 — Fuel cell current begins to decrease.

55:58:02 — Master caution and warning caused by AC bus 2 being reset.

55:58:06 — Master caution and warning triggered by DC main bus undervoltage.

55:58:07 — DC main bus A drops below 26.25 volts and in the next few seconds levels off at 25.5 volts.

55:58:07 — Haise: "AC 2 is showing zip."

55:58:25 — Haise: "Yes, we got a main bus A undervolt now, too, showing. It's reading about 25 and a half. Main B is reading zip right now."

56:00:06 — Master caution and warning triggered by high hydrogen flow rate to fuel cell 2.

(Not all of the transcript)