# SDR 96UAL900276

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N422UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 503
- Engine: Iae V2527A5
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Malfunctioned
- Location: Cabin
- Component: Nord Micro, 6331166394
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96UAL900276

## Discrepancy

LOST CABIN PRESSURE AT FL350.  EXECUTED EMERGENCY DESCENT AND REGAINED CONTROL OF CABIN IN MANUAL MODE.  *S/D*  ELECTRONIC BOX NR 1 FAILED ON OUTFLOW VALVE DRIVING THE VALVE OPEN.  REPLACED OUTFLOW VALVE AND OPERATIONALLY CHECKED NORMAL.

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