# SDR AALA202211160373

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 15, 2022
- Submitted: November 16, 2022
- Operation: Air carrier
- Aircraft: [N523UW](https://openairdocs.org/aircraft/N523UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3960
- Aircraft time: 45,888 hours, 16,843 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 132340
- Condition: No Test
- Location: Emergency Lights
- Part time: 45,877 hours, 16,839 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202211160373

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: DURING SYTEM TEST OF THE EMERGENCY LIGHTS, EMERGENCY POWER SUPPLY UNIT 10WL IS FAULTING. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 33-51-38.

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