# SDR 2001UALA00943

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2001
- Submitted: July 10, 2001
- Operation: Air carrier
- Aircraft: N7277U
- Make and model: Boeing 727222
- Aircraft serial: 21424
- Aircraft time: 64,866 hours, 37,176 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Seal
- Part number: 7133991
- Condition: Missing
- Location: Outflow Valve
- Stage of operation: DE
- 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/2001UALA00943

## Discrepancy

CABIN PRESSURE CANNOT BE MAINTAINED IN DESCENT.  *S/D*  FOUND OUTFLOW VALVE FRAME SEAL MISSING.  REPLACED FRAME SEAL.  OPERATIONS CHECK NORMAL.

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