# SDR UALA2013020400684

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2013
- Submitted: February 15, 2013
- Operation: Air carrier
- Aircraft: [N660UA](https://openairdocs.org/aircraft/N660UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 27115
- Aircraft time: 85,413 hours, 13,595 cycles
- Engine: Pwa PW4060
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Controller
- Part number: 77328915
- Part serial: 18
- Condition: Faulted
- Location: Lt Engine Bleed
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2013020400684

## Discrepancy

LEFT ENGINE HPSOV MESSAGE WHEN REDUCING THRUST FOR DESCENT.  BITE TEST CONFIRMS HPC FAULTY, REPLACED PER MM. ACTIVATED HPSOV. BITE TEST NO LONGER FAULTING HPC.

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