# SDR AALA202103059018

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 4, 2021
- Submitted: March 5, 2021
- Operation: Air carrier
- Aircraft: [N778XF](https://openairdocs.org/aircraft/N778XF), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 4127
- Aircraft time: 32,705 hours, 14,736 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 2079113AC
- Part serial: 0054756
- Condition: Inoperative
- Location: Cabin Pressure
- Part time: 66,344 hours, 24,953 cycles
- Stage of operation: CL
- 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/AALA202103059018

## Discrepancy

AIRCRAFT WAS GROUNDED: THE CABIN ALTIMETER WAS CLIMBING AND DESENDING. SWITCHED TO SYSTEM #2 AND THE PRESSURIZATION STABLIZED  AND FUNCTIONED NORMALY. REMOVED AND REPLACED CABIN PRESSURE CONTROLLER IAW AMM 21-31-34-000-001-A AND 21-34-400-001-A.

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