# SDR 2008UALA06011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2008
- Submitted: October 15, 2008
- Operation: Air carrier
- Aircraft: N551UA
- Make and model: Boeing 757222
- Aircraft serial: 25399
- Aircraft time: 64,445 hours, 18,604 cycles
- Engine: Pwa PW2037
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Flapper Valve
- Condition: Damaged
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: W
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA06011

## Discrepancy

CREW REPORT:  COCKPIT TEMP 90F - CABIN NORMAL.  PRESSURIZATION IRREGULAR ON DESCENT DUE TO EXISTING PROBLEM.  CABIN CLIMBED TO 8000FT.   FOUND CONDITIONED AIR CHECK VALVE FLAPPER DAMAGED.  REPLACED FLAPPER.


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