# SDR AALA202409165399

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 13, 2024
- Submitted: September 16, 2024
- Operation: Air carrier
- Aircraft: [N558UW](https://openairdocs.org/aircraft/N558UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5282
- Aircraft time: 36,634 hours, 15,143 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Proximity Sensor
- Condition: Defective
- Location: Zone 800
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202409165399

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: 4L DOOR NOT SHOWING SLIDE ARMED WHEN LEVER IN ARM POSITION.ALL OTHER INDICATIONS NORMAL UNTIL ENCOUNTERED TURBULENCE IN FLIGHT. REMOVED AND REPLACED PROX SENSOR 7WN1.

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