# SDR AALA202605180980

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 16, 2026
- Submitted: May 18, 2026
- Operation: Air carrier
- Aircraft: [N979UY](https://openairdocs.org/aircraft/N979UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5763
- Aircraft time: 39,376 hours, 16,396 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Proximity Sensor
- Part number: DHE1141
- Condition: Dirty
- Location: Zone 800
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202605180980

## Discrepancy

AIRCRAFT WAS GROUNDED: AN INTERMITTENT PRESSURIZATION LIGHT ON 4R DOOR, TRIGGERED OVER PRESSURE INDICATION ON 4R DOOR EACH TIME IT SHOWED UNARMED IN THE FLIGHT DECK (INDICATING AS IT SHOULD CABIN PRESSURIZED). EACH TIME FLIGHT ATTENDENT JIGGLED THE ARMED HANDLE THE ARMED INDICATION IN THE FLIGHT DECK WOULD ILLUMINATE AND THE OVER PRESSURE INDICATION ON THE 4R DOOR WOULD STOP. CABIN PRESSURE REMAINED STEADY AT ALL TIMES. MAINTENANCE CLEANED PROXIMITY SENSOR 7WN2 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.

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