# SDR AALA202505066813

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 29, 2025
- Submitted: May 6, 2025
- Operation: Air carrier
- Aircraft: [N925UY](https://openairdocs.org/aircraft/N925UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6613
- Aircraft time: 31,770 hours, 13,028 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: AD321431
- Condition: No Test
- 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/AALA202505066813

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: LEFT HAND SEAT ROWS 14,15,17,18,21 AND 22 EMERGENCY LIGHTS ARE INOPERATIVE.  REPLACED THE BATTERY FOR EMERGENCY POWER SUPPLY UNIT 11WL AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK OF THE EMERGENCY LIGHTING SYSTEM PER AMM 33-51-38.

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