# SDR I5PA2021052275704

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2021
- Submitted: June 6, 2021
- Operation: Air carrier
- Aircraft: [N757QM](https://openairdocs.org/aircraft/N757QM), registered now
- Make and model: Boeing 757-29J
- Registry model: [Boeing 757-29J](https://openairdocs.org/model/boeing-757-29j) (OpenAirDocs)
- Aircraft serial: 27203
- Aircraft time: 61,996 hours, 33,134 cycles
- Engine: Pwa PW2037
- Engine time: 55,095 hours, 19,316 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Pilot Valve
- Part number: 33990047
- Part serial: 1002C
- Condition: Faulted
- Location: Lt Engine
- Stage of operation: TX
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/I5PA2021052275704

## Discrepancy

LEFT HIGH STAGE PRESSURE SYSTEM WOULD NOT OPERATE AT IDLE UNTIL POWER IS INCREASED. ISSUE WAS FOUND DUE TO A FAULTY HPSOV AND HP PILOT. THIS SDR REPORTS THE HP PILOT, THE HPSOV WAS PREVIOUSLY REPORTED ON A SEPARATE SDR.

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