# SDR UALA2012120306897

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2012
- Submitted: December 28, 2012
- Operation: Air carrier
- Aircraft: [N792UA](https://openairdocs.org/aircraft/N792UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26934
- Aircraft time: 68,395 hours, 9,745 cycles
- Engine: Pwa PW40903
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 339910031
- Part serial: 27
- Condition: Faulty
- Location: Cabin Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012120306897

## Discrepancy

BLEED FAMV L LEFT ENGINE BLEED FAN AIR MODULATING VALVE (FAMV) FAILED OPEN OR CLOSED OR LEFT AIR SUPPLY AND CABIN PRESSURE CONTROLLER FAILURE.  HPFAC REPLACED PER AMM.  SYS OPS NORMAL.

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