# SDR UALA2010010400055

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 4, 2010
- Submitted: January 4, 2010
- Operation: Air carrier
- Aircraft: [N666UA](https://openairdocs.org/aircraft/N666UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29238
- Aircraft time: 40,814 hours, 11,251 cycles
- Engine: Pwa PW4056
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Controller
- Part number: 7927558
- Part serial: 6
- Condition: Malfunctioned
- Location: Bleed System
- Stage of operation: CL
- 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/UALA2010010400055

## Discrepancy

DUCT PRESS APPROX 35L-20R IN CLIMB. REMAINS SPLIT 20L-10R IN CRUISE 350 EPR 1.17.  RAN BITE CHECK ON AIR SUPPLY BITE MODULE, FOUND FAULTS ON PRV AND PRV CONTROL. REPLACED PRV AND PRV CONTROL. OP CHECKS NORMAL

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