What was found
APU FAILED TO START DRAINED THEN FILLED APU GEARBOX OIL PER AMM 12-13-31. REMOVED AND REPLACED LOW OIL PRESSURE SWITCH IAW AMM 49-94-22. LEAK/OPS CHECK NORMAL. PARTS USED: M1103P0911-02,QTY :1
- Difficulty date
- March 27, 2023
- Submitted
- March 27, 2023
- Operation
- Air carrier
- Aircraft
- N77295
- Make and model
- Boeing 7378
- Aircraft serial
- 34001
- Aircraft time
- 50,657 hours, 18,023 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Pressure Switch
- Part number
- M1103P091102
- Condition
- Unknown
- Location
- Apu Gearbox
- Stage of operation
- CL
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.