# SDR UALA2008112506670

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 23, 2008
- Submitted: December 5, 2008
- Operation: Air carrier
- Aircraft: [N665UA](https://openairdocs.org/aircraft/N665UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29237
- Aircraft time: 36,606 hours, 10,283 cycles
- Engine: Pwa PW4056
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Part number: 79027013
- Condition: Failed
- Location: Lt Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2008112506670

## Discrepancy

LEFT ENG HPSOV ON MOMENTARILY DURING DESCENT.  PER FLT CREW, CAME ON WHEN PWR PULLED TO IDLE FOR DESCENT AND EXTINGUISHED AFTER APPROX 1 MIN.  FOUND HPSOV BAD ON HEALTH CHECK.  REPLACED HPSOV.  OPS AND LEAK CHECK OKAY.  NO FAULTS OR MESSAGES.

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