# SDR 2004UALA00057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 24, 2004
- Submitted: March 2, 2004
- Operation: Air carrier
- Aircraft: [N439UA](https://openairdocs.org/aircraft/N439UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 683
- Aircraft time: 23,815 hours, 8,162 cycles
- Engine: Iae V2527A5
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Valve
- Part number: VFT300A1
- Part serial: 557
- Condition: Defective
- Location: Cabin Pressure
- Stage of operation: CR
- 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/2004UALA00057

## Discrepancy

RETURN TO FIELD DUE TO A PRESSURIZATION PROBLEM.  INABILITY TO PRESSURIZE WAS RESULT OF A MALFUNCTIONING SKIN AIR OUTLET VALVE.  THE DEFECTIVE UNIT WAS REPLACED AND VERIFIED FAULTY.  NO FURTHER PRESSURIZATION PROBLEMS REPORTED SINCE UNIT REPLACEMENT.

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