# SDR AALA201908199026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 17, 2019
- Submitted: August 19, 2019
- Operation: Air carrier
- Aircraft: [N567UW](https://openairdocs.org/aircraft/N567UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5728
- Aircraft time: 20,873 hours, 8,221 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 2079002AC
- Part serial: 9973223
- Condition: Failed
- Location: Cabin Pressure
- Part time: 55,460 hours, 24,502 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201908199026

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT AIR RETURNED TO SAL ON ACCOUNT OF LOSS OF BOTH PRESSURIZATION SYSTEMS. MAINTENANCE REPLACED OUT FLOW VALVE (10HL) IAW AMM 21-31-51-400-001-A AND PERFORMED TEST THE PRESSURE CONTROL AND MONITORING SYSTEM IAW AMM 21-31-00-710-002-A.

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