# SDR UALA2010051701653

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 15, 2010
- Submitted: May 17, 2010
- Operation: Air carrier
- Aircraft: [N797UA](https://openairdocs.org/aircraft/N797UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26924
- Aircraft time: 54,336 hours, 7,839 cycles
- Engine: Pwa PW4090
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Cabin Pressure
- Part number: 11511007
- Part serial: 95
- Condition: Malfunctioned
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010051701653

## Discrepancy

DECOMPRESSON ISSUE, RTFL.  REPLACED LT ASCPC, GROUND TEST PASSED. ALSO CABIN PRESSURE SYS GROUND TEST PASSED. OPERATED BOTH OUTFLOW VALVES MANUALLY. COMPARED WITH INDICATION, ALL OK.

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