# SDR 2008UALA03764

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 8, 2008
- Submitted: July 15, 2008
- Operation: Air carrier
- Aircraft: [N518UA](https://openairdocs.org/aircraft/N518UA), registered now
- Make and model: Boeing 757222
- Aircraft serial: 24871
- Aircraft time: 60,770 hours, 20,339 cycles
- Engine: Pwa PW2037
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Open
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA03764

## Discrepancy

PRESSURIZATION BECAME UNCONTROLLABLE.  FLIGHT DIVERTED.  FOUND E&E EXHAUST VALVE STICKING OPEN.  REPLACED VALVE, ALL PRESSURIZATION TESTS WERE NORMAL.

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