# SDR DALA2025072305531

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2025
- Submitted: July 23, 2025
- Operation: Air carrier
- Aircraft: [N534DT](https://openairdocs.org/aircraft/N534DT), registered now
- Make and model: Airbus A321-271NX
- Registry model: [Airbus A321-271NX](https://openairdocs.org/model/airbus-s-a-s-a321-271nx) (OpenAirDocs)
- Aircraft serial: 11357
- Aircraft time: 9,456 hours, 2,321 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: Faulted
- 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/DALA2025072305531

## Discrepancy

AIRCRAFT 5034, WHEN TESTING EMERGENCY LIGHTS MULTIPLE INTERIOR AISLE LIGHTS INOP (ESCAPE PATH LIGHTING).   REPLACED EPSU (17WL) AND BATTERY PACK. ALL LIGHTS TEST GOOD (ESCAPE PATH). (LP 7341335)

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