# SDR UALA2012042302419

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2012
- Submitted: May 25, 2012
- Operation: Air carrier
- Aircraft: [N776UA](https://openairdocs.org/aircraft/N776UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26937
- Aircraft time: 65,939 hours, 11,754 cycles
- Engine: Pwa PW4077
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Shutoff Valve
- Part number: 8102294
- Part serial: 135
- Condition: Inoperative
- Location: Left
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2012042302419

## Discrepancy

FOUND LEFT TRIM AIR PRSOV NOT CLOSING.  REMOVED LEFT TRIM AIR PRSOV REF MM.   INSTALLED NEW TRIM AIR PRSOV PER MM. MAT TEST PASSED.

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