What was found
APU OIL MONITORING DATA SHOWS OIL CONSUMPTION TO BE TRENDING HIGHER THAN EXPECTED. GROUNDED - YES. REMOVED AND REPLACED APU FUEL CONTOL UNIT PER B737-800 AMM 49-31-11.
- Difficulty date
- October 26, 2022
- Submitted
- October 31, 2022
- Operation
- Air carrier
- Aircraft
- N589AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35686
- Aircraft time
- 54,050 hours, 15,891 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Fcu
- Part number
- 4419215
- Part serial
- CUC16634
- Condition
- Leaking
- Location
- Apu
- Part time
- 12,158 hours, 21,909 cycles
- Stage of operation
- IN
- How discovered
- V
- Nature of condition
- K
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.