What was found
APU OIL QTY READS UNKNOWN WITH APU SHUT DOWN. GROUNDED - YES. CHECKED OIL QTY ON APU SIGHT GAUGE AND FOUND OIL 2 QTS LOW. REPLACED OIL LEVEL SENSOR PER B737-900 AMM 49-94-11. LK AND OPS CK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.
- Difficulty date
- June 16, 2019
- Submitted
- June 17, 2019
- Operation
- Air carrier
- Aircraft
- N492AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44110
- Aircraft time
- 14,341 hours, 4,724 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Sensor
- Part number
- 38762983
- Part serial
- 1516222106825
- Condition
- Inoperative
- Location
- Apu Oil Level
- Part time
- 4,340 hours, 8,360 cycles
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.