What was found
STATUS MESSAGE NR 4 ENGINE FIRE LP A CYCLES ON & OFF. FAULT WAS INTERMITTENT FOR 2 HRS THEN MESSAGE SELF ERASED. GROUND TESTED & PASSED. REPLACED NR 4 ENGINE LOOP A FIRE WARNING DETECTION CARD PER MM, OPS OKAY,
- Difficulty date
- January 8, 2012
- Submitted
- January 11, 2012
- Operation
- Air carrier
- Aircraft
- N177UA
- Make and model
- Boeing 747422
- Aircraft serial
- 24384
- Aircraft time
- 89,057 hours, 10,869 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2612 · Fire Detection
- Part
- Circuit Card
- Part number
- 71012211758002
- Condition
- Failed
- Location
- Nr 4 Fire Detect
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- N
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.