# SDR AALA202107285671

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2021
- Submitted: July 28, 2021
- Operation: Air carrier
- Aircraft: [N909AM](https://openairdocs.org/aircraft/N909AM), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7756
- Aircraft time: 11,947 hours, 4,487 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 2079113AD
- Part serial: 1754650
- Condition: Faulted
- Location: Cabin Pressure
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202107285671

## Discrepancy

AIRCRAFT WAS GROUNDED: CABIN PRESSURE LOW PRESSURE ELECTRONIC CENTRALIZED AIRCRAFT MONITOR CAME ON AT 6000FT- OUTFLOW VALVE OPENED AND ELECTRONIC CENTRALIZED AIRCRAFT MONITOR CLEARED ON LANDING- OUTFLOW VALVE AMBER AND SAFETY VALVE OPENED AT 6000FT. REMOVED AND REPLACED CABIN PRESSURE CONTROLLER PER AMM 21-31-34.

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