# SDR AALA202504041683

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 3, 2025
- Submitted: April 4, 2025
- Operation: Air carrier
- Aircraft: [N510UW](https://openairdocs.org/aircraft/N510UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3858
- Aircraft time: 53,599 hours, 20,556 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Connector
- Condition: Dirty
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202504041683

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: DURING AN OPERATIONAL TEST OF THE EMERGENCY LIGHTING SYSTEM ON CIDS 1, A FAULT MESSAGE FOR EMERGENCY POWER SUPPLY UNIT 10WL DISPLAYED. MAINTENANCE CLEANED THE ELECTRICAL CONNECTOR FOR THE EMERGENCY LIGHTING SYSTEM ON THE R1 DOOR SLIDE AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-00.

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