# SDR CALA2013092691493

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2013
- Submitted: September 27, 2013
- Operation: Air carrier
- Aircraft: [N791UA](https://openairdocs.org/aircraft/N791UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26933
- Aircraft time: 69,335 hours, 9,949 cycles
- Engine: Pwa PW40903
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Shutoff Valve
- Part number: 8102295
- Part serial: 167
- Condition: Faulty
- 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/CALA2013092691493

## Discrepancy

TRIM AIR PRSOV LT.  DUE TO HISTORY OF TRIM AIR PRSOV LT NOT IN THE COMMANDED POSITION.  REPLACED LT TRIM AIR PRSOV, OPERATIONS CHECKED NORMAL.

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