# SDR AALA202507149220

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 12, 2025
- Submitted: July 14, 2025
- Operation: Air carrier
- Aircraft: [N442AN](https://openairdocs.org/aircraft/N442AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 10711
- Aircraft time: 14,256 hours, 3,804 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- 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/AALA202507149220

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: CLASS 1 FAULT ON CIDS FOR EMERGENCY POWER SUPPLY UNIT 13WL. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 13WL PER AMM 33-51-38 (AALA202507139220) AND THE #1 CIDS DIRECTOR PER AMM 23-73-34. (AALA202507141191) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO FAULTS NOTED.

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