# SDR ASAA2023061543584

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 15, 2023
- Submitted: June 15, 2023
- Operation: Air carrier
- Aircraft: [N919AK](https://openairdocs.org/aircraft/N919AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44087
- Aircraft time: 7,874 hours, 2,409 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Element
- Part number: 38809381
- Condition: Clogged
- Location: Apu
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023061543584

## Discrepancy

WHILE PERFORMING ASA TSR714484 FOUND APU DIFF PRESS/ INDICATOR BUTTON POPPED. GROUNDED - YES. REPLACED LUBE FILTER ELEMENT AND APU OIL FILTER INDICATOR REF B737-9 AMM 49-91-12 AND AMM 49-91-13 LEAK CHECK GOOD, NO FAULTS NOTED DURING GROUND VERIFICATION.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.