# SDR UALA2013041102497

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 9, 2013
- Submitted: May 30, 2013
- Operation: Air carrier
- Aircraft: [N776UA](https://openairdocs.org/aircraft/N776UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26937
- Aircraft time: 70,160 hours, 12,371 cycles
- Engine: Pwa PW4077
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Shutoff Valve
- Part number: 8102294
- Part serial: 94
- Condition: Failed
- Location: Ac Bay
- 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/UALA2013041102497

## Discrepancy

TRIM AIR PRSOV RIGHT TRIM AIR PRESSURE RELIEF SHUTOFF VALVE (PRSOV) FAILED.  REPLACED TRIM AIR PRSOV VALVE, OPS CHECK GOOD.

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