What was found
APU GENERATOR DIFFERENTIAL PRESSURE SWITCH WAS FOUND FAULTY AND REPLACED DUE TO AN APU FAULT DURING START. APU OPERATED NORMALLY AFTER REPLACEMENT.
- Difficulty date
- August 26, 2021
- Submitted
- September 10, 2021
- Operation
- Air carrier
- Aircraft
- N757QM
- Make and model
- Boeing 75729J
- Aircraft serial
- 27203
- Aircraft time
- 62,738 hours, 33,318 cycles
- System (JASC)
- 4920 · APU Core Engine
- Part
- Pressure Switch
- Part number
- 38760483
- Part serial
- NSN
- Condition
- Faulted
- Location
- Apu
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.