# SDR DALA2020122104169

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2020
- Submitted: December 21, 2020
- Operation: Air carrier
- Aircraft: [N323NB](https://openairdocs.org/aircraft/N323NB), registered now
- Make and model: Airbus A319-114
- Registry model: [Airbus A319-114](https://openairdocs.org/model/airbus-a319-114) (OpenAirDocs)
- Aircraft serial: 1453
- Aircraft time: 53,974 hours, 27,789 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Condition: Malfunctioned
- Location: Cabin Pressure
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2020122104169

## Discrepancy

PRES-DESCENDED OFF SCHEDULE DUE TO PRESSURE RELIEF VALVE OPENING.  CPC 1 FAULT INDICATED ON ECAM. MASKS DID NOT DEPLOY.  CREW DONNED THEIR O2 MASKS.  CORRECTIVE ACTION: REPLACED CABIN PRESS CONTROLLER 1 AND OUTFLOW VALVE, ALL CHECK GOOD.

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