Service difficulty report · Controller · Boeing 757212

Difficulty date
November 23, 2005
Submitted
December 6, 2005
Operation
Air carrier
Aircraft
N757AT
Make and model
Boeing 757212
Aircraft serial
23127
Aircraft time
58,429 hours, 28,883 cycles
Part
Controller
Part number
2117338813
Part serial
1081586
Condition
Failed
Location
Cabin Pressure
Stage of operation
CR
How discovered
O
Nature of condition
S
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

BOTH AUTOPRESSURIZATION CONTROLLERS FAILED AT THE SAME TIME AT FL350 WAS ABLE TO CONTROL OUTFLOW VALVE IN MANUAL. DESCENDED TO 10,000 AND DIVERTED TO MCO. REPLACED NR 2 AUTO CONTROLLER DUE TO A LOSS OF AC POWER LAST FLT FAULT ON BITE. BITE AND VERIFICATION OF NR 1 AND NR 2 AUTO CONTROLLERS CHECK OK. MANUAL OPERATION NORMAL.