# SDR 98UAL900549

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N421UA
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 500
- Engine: Iae V2527A5
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Condition: Broken
- Location: Cabin
- Component: Nordmicro, 90231570381
- Stage of operation: CR
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98UAL900549

## Discrepancy

PASSING 9000' GOT CABIN PRESSURE ECAM & MASTER WARNING. VERTICAL SPEED WAS UP TO 500+ AND  DOWN TO -1200 FPM.  CABIN TEMP WENT FROM WARM TO COLD SEVERAL TIMES BEFORE LANDING.  RETURNED TO DEN.  *S/D*  FOUND BROKEN BACKSHELL ON ACTUATOR ELECTRONIC 1, 10HLA OF OUTFLOW VALVE.  BROKEN BACKSHELL WAS CHAFING NUMEROUS WIRES.  PROTECTED EACH WIRE IN CONNECTOR WITH HEAT SHRINK, REPLACED BACKSHELL AND SECURED.

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