SDR HALA0700075

Service difficulty report · Apu · Boeing 76733A

Difficulty date: March 3, 2007
Submitted: March 5, 2007
Operation: Air carrier
Aircraft: N591HA
Make and model: Boeing 76733A
Aircraft serial: 33423
Aircraft time: 15,610 hours, 3,020 cycles
System (JASC): 4920 · APU Core Engine
Part: Apu
Condition: Shutdown
Location: Apu Bay
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

ATB - APU AUTO SHUTDOWN CLIMBING THRU FL350, FAULT LIGHT ILL AND EICAS MESSAGE "APU FAULT" DISPLAYED. ACCOMPLISHED ECU BITE, FOUND "OVERSPEED" FAULT W/NO MINI FLAGS. ACCOMP FIM 49-11-00 FIG 111. CHECKED P2 SENSE LINES. NO DEFECTS NOTED. AS PER POWERPLANT ENG, REPLACED P2 SENSOR PER AMM 49-61-04. REPLACED FCU PER AMM 49-31-01. RERACKED ECU, GND RUN-UP AND LEAK FCU/P2 SENSOR OK.

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