# SDR AALA202604203888

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 14, 2026
- Submitted: April 20, 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: 44,658 hours, 17,786 cycles
- System (JASC): [5220 · Emergency Exits](https://openairdocs.org/jasc/5220)
- Part: Bottle
- Part number: FE277000
- Part serial: FR1433
- Condition: Leaking
- Location: Zone 800
- Part time: 53,247 hours, 21,599 cycles
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202604203888

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: MULTIPLE 3R CHECK DOOR PRESSURE MESSAGES WHICH RESULTED IN SERVICING THE DOOR DAMPER AND EMERGENCY OPERATION CYLINDER MULTIPLE TIMES. MAINTENANCE REPLACED THE 3R DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PER AMM 52-22-14.

---
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.