# SDR AALA202601271554

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 25, 2026
- Submitted: January 27, 2026
- Operation: Air carrier
- Aircraft: [N411AN](https://openairdocs.org/aircraft/N411AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 9318
- Aircraft time: 19,442 hours, 5,386 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Pressure Switch
- Part number: 1266100
- Part serial: 40866
- Condition: Fault Message
- Location: Zone 100
- Part time: 19,442 hours, 5,386 cycles
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202601271554

## Discrepancy

AIRCRAFT WAS GROUNDED: DURING ENROUTE CLIMB FLIGHT ATTENDANT REPORTED DOOR 4R CABIN PRESSURE WARNING LIGHT FLASHING. THEY REPORTED THAT IT WOULD STOP FLASHING IF THEY PRESSED ON THE SLIDE ARM LEVER, BUT LEVER WOULDN'T STAY FULLY SEATED. THIS WAS CONFIRMED ON DOOR PAGE ON EWD. DOOR INDICATION IS CLOSED/GREEN, BUT DOOR NOT ARMED. DIFFERENTIALPRESSURE WAS ABOVE 2.0 PSI WHEN DISCOVERED. ALL DOORS SHOWED ARMED AT PUSHBACK. MAINTENANCE REPLACED PRESSURE SWITCH 14WN PER AMM 52-73-12 (AALA202601271554) AND PROXIMITY SENSOR 7WN2 PER AMM 52-73-11 (AALA202601278222). A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED.

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