# SDR AALA202605219210

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 20, 2026
- Submitted: May 21, 2026
- Operation: Air carrier
- Aircraft: [N557UW](https://openairdocs.org/aircraft/N557UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5269
- Aircraft time: 43,377 hours, 17,860 cycles
- System (JASC): [5210 · Passenger/Crew Doors](https://openairdocs.org/jasc/5210)
- Part: Bottle
- Condition: Low Pressure
- Location: Zone 800
- Stage of operation: TX
- 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/AALA202605219210

## Discrepancy

AIRCRAFT WAS GROUNDED: WHEN ARMING DOORS CIDS PANEL INDICATES DOOR 4L IS NOT ARMED, INDICATION ON DOOR/OXY PAGE SHOWS ARMED. MAINTENANCE VERIFIED ARM/DISARM INDICATION ON CIDS PANEL IS NORMAL. 4L DOOR DAMPER AND EMERGENCY OPERATION CYLINDER SHOWS LOW PRESSURE ON CIDS PANEL. MAINTENANCE SERVICED 4L DOOR DAMPER AND EMERGENCY OPERATION CYLINDER PER AMM 52-10-00.

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