# SDR CWQA09032010

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 1, 2010
- Submitted: September 3, 2010
- Operation: Air carrier
- Aircraft: [N154AK](https://openairdocs.org/aircraft/N154AK), registered now
- Make and model: Lear 60LEAR
- Aircraft serial: 114
- Aircraft time: 4,421 hours, 2,641 cycles
- Engine: Pwa PW305A
- Engine time: 4,421 hours, 2,641 cycles
- System (JASC): [7530 · Compressor Bleed Control](https://openairdocs.org/jasc/7530)
- Part: Valve
- Condition: Defective
- Location: Lt Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: X
- Precautionary procedure: H
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CWQA09032010

## Discrepancy

LT ENGINE OIL PRESS LIGHT ILLUMINATED, ENGINE ROLL BACK TO 35 PERCENT N1, SWITCHED OFF ENGINE SYNC, N1 RETURNED TO 55 PERCENT AND OIL PRESSURE INCREASED AND SETTLED IN GREEN ARC BUT 10 PSI BELOW NORMAL.  ENGINE COMPUTER DOWNLOADED, OEM ANALYZED AND REPORTED DOWNLOAD DATA INDICATES POSSIBLE ENGINE FLAME OUT DUE TO LOSS OF AIR PRESSURE.  REPLACEMENT OF LT ENGINE ALL THREE AIR PRESSURE BLOW OFF VALVES PER OEM RECOMMENDATIONS IN PROGRESS AT THIS TIME.

---
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.