# SDR ASAA2017062921230

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 29, 2017
- Submitted: June 30, 2017
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 13,935 hours, 4,574 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Indicator
- Part number: 7590361101
- Condition: Tripped
- Location: Apu Oil Filter
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017062921230

## Discrepancy

WHILE ACCOMPLISHING APU GVI,  FOUND DELTA P INDICATOR FOR OIL FILTER POPPED.  ACFT GROUNDED.  REMOVED AND REPLACED LUBE FILTER ELEMENT AND RESET OIL FILTER INDICATOR PIN IAW AMM 49-91-13. APU CHIP DETECTOR HAD NO METAL OR OTHER DEBRIS. OPERATED APU, NO LEAKS NOTED, AND OIL FILTER INDICATOR DID NOT POP AGAIN.

---
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.