# SDR UALA2009122103955

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2009
- Submitted: December 31, 2009
- Operation: Air carrier
- Aircraft: N501UA
- Make and model: Boeing 757222
- Aircraft serial: 24622
- Aircraft time: 65,868 hours, 24,756 cycles
- Engine: Pwa PW2037
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Control Unit
- Part number: 33990046U2
- Part serial: 238
- Condition: Malfunctioned
- Stage of operation: CL
- 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/UALA2009122103955

## Discrepancy

HIGH STAGE BLEED ILLUM, FLIGHT DIVERTED. FROM SNA WITH BLEEDS OFF DUE TO EXCESS FUEL, POSSIBLE TRIGGER OF BOTH FAULTS. FOUND LT & RT HIGH STAGE PILOT CONTROL OVER PRESSURE INDS POPPED. RESET LT HIGH STAGE PILOT CONTROL, REPLACED RT HIGH STAGE PILOT CONTROL. RAN BOTH ENGS, BLEEDS NORMAL, NO FAULTS.

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