# SDR AALA20141213004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2014
- Submitted: December 16, 2014
- Operation: Air carrier
- Aircraft: N471AA
- Make and model: Doug DC-9-82
- Registry model: [Doug DC-9-82](https://openairdocs.org/model/mcdonnell-douglas-dc-9-82) (OpenAirDocs)
- Aircraft serial: 49601
- Aircraft time: 75,310 hours, 39,953 cycles
- Engine: Pwa JT8D217C
- System (JASC): [7931 · Engine Oil Pressure](https://openairdocs.org/jasc/7931)
- Part: Pressure Switch
- Part number: 1163P0041
- Condition: Defective
- Location: Oil System
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20141213004

## Discrepancy

AIR INTERRUPT, DIVERTED & EMER DECLARED & LANDING UNEVENTFUL.  ACFT NOT OVERWEIGHT.  DURING CRUISE, LT ENG OIL FILTER BYPASS LIGHT ILLUMINATED.  R & R LT ENG OIL FILTER DIFFERENTIAL PRESS SWITCH ASSEMBLY IAW AMM 79-35-01-201.  PERFORMED OPERATION & LEAK CHECK.  SYS CHECKED NORMAL.

---
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.