SDR UALA2011020400615

Service difficulty report · Engine · Boeing 777222

Difficulty date: February 4, 2011
Submitted: February 18, 2011
Operation: Air carrier
Aircraft: N224UA
Make and model: Boeing 777222
Aircraft serial: 30225
Aircraft time: 37,143 hours, 4,543 cycles
Engine: Pwa PW4090
System (JASC): 4920 · APU Core Engine
Part: Engine
Condition: Shutdown
Location: Apu
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

APU AUTO SHUTDOWN PRIOR TO DEPARTURE. ACFT HAS HISTORY. APU STATUS MESSAGE DURING ENG START. APU FAULTING, HIGH OIL TEMP, CURRENTLY SHOWING NO FAULTS. TROUBLESHOOTING IAW FIM. SUSPECT OBSTRUCTION IN INLET DUCT. MESSAGE HAS BEEN CLEARED. BUT APU PAGE INFO APU LIMIT. APU DID NOT SHUTDOWN. FOUND APU OIL LEVEL FULL, ALL CHIP DETECTORS FREE FROM METAL. RAN APU WITH HEAVY LOAD FOR 30 MIN. NO AUTO SHUTDOWN ACCORD. NO MESSAGES ACTIVE OR LATCHED.