# SDR AALA202604100093

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2026
- Submitted: April 10, 2026
- Operation: Air carrier
- Aircraft: [N553UW](https://openairdocs.org/aircraft/N553UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4960
- Aircraft time: 44,592 hours, 17,759 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Cylinder
- Condition: Low Pressure
- Location: Zone 800
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604100093

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: FLIGHT CREW REPORTED THAT WITH ENGINES SHUT DOWN AN ECAM MESSAGE FOR CABIN RESIDUAL PRESSURE DISPLAYED. FLIGHT ATTENDANT REPORTED DOOR 3L AND 3R PRESSURE LIGHT WAS ON. AIRCRAFT WAS DEPRESSURIZED WITH LIGHT ON. MAINTENANCE SERVICED R3 DOOR DAMPER AND EMERGENCY OPERATION CYCLINDER PER AMM 52-22-00 WHICH CLEARED THE MESSAGE ON THE CIDS.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.