# SDR AALA202603110719

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 9, 2026
- Submitted: March 11, 2026
- Operation: Air carrier
- Aircraft: [N156AN](https://openairdocs.org/aircraft/N156AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6983
- Aircraft time: 30,105 hours, 12,026 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Safety Valve
- Part number: 90241570403
- Part serial: 17115497
- Condition: Warning Message
- Location: Zone 200
- Part time: 22,804 hours, 11,561 cycles
- Stage of operation: TO
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202603110719

## Discrepancy

AIRCRAFT WAS GROUNDED: AIRCRAFT RETURNED TO MIA DUE TO THE FLIGHT CREW REPORTING THAT IMMEDIATELY AFTER TAKEOFF RECEIVED CABIN PRESSURE SYSTEM 1 AND SYSTEM 2 ECAM FAULTS. THE FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES BUT WERE UNABLE TO CONTROL PRESSURIZATION SYSTEM MANUALLY. SUBSEQUENTLY RECEIVED CABIN PRESSURE SAFETY VALVE OPEN INDICATION. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE # 1 CABIN PRESSURE CONTROLLER 11HL (AALA202603118095) AND THE # 2 CABIN PRESSURE CONTROLLER 12HL (AALA202603117222) PER AMM 21-31-34. MAINTENANCE ALSO REPLACED CABIN PRESSURE SAFETY VALVE 6HL (AALA202603112750) AND CABIN PRESSURE SAFETY VALVE 7HL (AALA202603110719) PER AMM 21-31-00. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.

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