What was found
APU FAULT CODE SHOWING - "49-94304 OIL LEVEL SENSOR SHOWS OPEN CIRCUIT FAILURE". GROUNDED - YES. REMOVED AND REPLACED APU OIL LEVEL SENSOR REF B737-900 AMM 49-94-11. LEAK CHECK AND OPC GOOD.
- Difficulty date
- October 5, 2023
- Submitted
- October 6, 2023
- Operation
- Air carrier
- Aircraft
- N407AS
- Make and model
- Boeing 737900ER
- Aircraft serial
- 41731
- Aircraft time
- 41,106 hours, 12,835 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Sensor
- Part number
- 38762983
- Part serial
- 1616222108450
- Condition
- Faulty
- Location
- Apu Oil Level
- Part time
- 8,214 hours, 13,843 cycles
- Stage of operation
- IN
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.