Service difficulty report · Controller · Boeing 7572G7

Difficulty date
June 24, 2006
Submitted
June 26, 2006
Operation
Air carrier
Aircraft
N909AW
Make and model
Boeing 7572G7
Aircraft serial
24522
Aircraft time
62,670 hours, 23,895 cycles
Part
Controller
Part number
21173886
Part serial
114758
Condition
Inoperative
Location
Cabin Pressure
Part time
69,351 hours, 26,925 cycles
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

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

What was found

HNL - DIVERSION - FLT 931 - DURING CLIMB-OUT OF OGG EN ROUTE TO PHX, THE CREW NOTICED THAT THE CABIN WAS CLIMBING WITH THE AIRCRAFT IN AUTO 1 POSITION. RECEIVED CABIN ALT MASTER CAUTION AND SWITCHED TO AUTO 2, THERE WAS NO CHANGE. RECEIVED CABIN ALT 1 AND 2 STATUS MESSAGE WITH BOTH C/B/S IN. CREW DIVERTED TO HNL AND LANDED WITHOUT FURTHER EVENT. MAINTENANCE REMOVED AND REPLACED THE AUTO 2 CABIN PRESSURE CONTROLLER IAW MM 21-31-02-4. THE CABIN ALT AUTO CONTROLLER (AUTO 1) FAILED BITE CHECK, FAULTING THE AC MOTOR. REMOVED AND REPLACED BOTH A/C MOTORS ON THE OUTFLOW VALVE ACTUATOR IAW AMM 21-31-05-4. OPERATIONAL CHECKS WERE GOOD FOR BOTH AUTO CONTROLLERS.

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