SDR AWXA200100643

Service difficulty report · Controller · Boeing 757225

Difficulty date: December 16, 2001
Submitted: December 17, 2001
Operation: Air carrier
Aircraft: N915AW
Make and model: Boeing 757225
Aircraft serial: 22209
Aircraft time: 50,314 hours, 21,744 cycles
System (JASC): 2131 · Cabin Pressure Controller
Part: Controller
Part number: 21173886
Part serial: 113609
Condition: Failed
Location: Cabin Pressure
Part time: 46,040 hours, 20,021 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

PHX - AIR TURNBACK - AFTER TAKEOFF FROM PHX EN ROUTE TO CMH THE FLIGHT CREW RECEIVED EICAS MESSAGE FOR CABIN AUTO PRESSURE INOPERATIVE WITH CABIN 1 AND 2 DISPLAYED; THE AUTO INOPERATIVE LIGHT ILLUMINATED AND CABIN WAS UNABLE TO PRESSURIZE. AIRCRAFT TURNED BACK TO PHX AND MADE AN UNEVENTFUL LANDING. MAINTENANCE TROUBLESHOT THE PROBLEM AND REMOVED AND REPLACED THE CABIN PRESSURE CONTROLLER AND THE OUT FLOW VALVE IAW BMM 21-31-03, PG 201-206, AND BMM 21-31-02, PG 401-404. BOTH REPLACED PARTS OPERATIONALLY CHECKED GOOD.