What was found
APU OIL PRESSURE DIFFERENTIAL INDICATOR FOUND EXTENDED DURING INSPECTION WHILE SERVICING OIL. FILTER WAS REPLACED ALTHOUGH NO CONTAMINATION WAS FOUND DURING INSPECTION OF THE REMOVED FILTER.
- Difficulty date
- August 30, 2021
- Submitted
- September 10, 2021
- Operation
- Air carrier
- Aircraft
- N757QM
- Make and model
- Boeing 75729J
- Aircraft serial
- 27203
- Aircraft time
- 62,793 hours, 33,330 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Filter
- Part number
- 654T00358
- Part serial
- NSN
- Condition
- Faulty
- 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.