What was found
HEAVY OIL SMELL IN CABIN WITH APU RUNNING. FOUND OIL FILTER HOUSING LEAKING, REPLACED O-RING, NO LEAKS NOTED. SERVICED APU TO FULL, REPLACED COALESCER BAGS AND RAN APU. OIL QUANTITY DROPPED TO 50 PERCENT.
- Difficulty date
- August 20, 2009
- Submitted
- August 21, 2009
- Operation
- Air carrier
- Aircraft
- N174UA
- Make and model
- Boeing 747422
- Aircraft serial
- 24381
- Aircraft time
- 76,407 hours, 8,558 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 4990 · APU Oil System
- Part
- O-Ring
- Condition
- Damaged
- Location
- Apu
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- K, B
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.