# SDR AALA202405285841

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 24, 2024
- Submitted: May 28, 2024
- Operation: Air carrier
- Aircraft: [N973UY](https://openairdocs.org/aircraft/N973UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4893
- Aircraft time: 40,603 hours, 15,900 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 012798
- Condition: No Test
- Location: Emergency Lights
- Part time: 49,725 hours, 18,558 cycles
- 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/AALA202405285841

## Discrepancy

AIRCRAFT WAS GROUNDED: EPSU TEST FAILING UNIT 11WL. REMOVED AND REPLACED EPSU (11WL) IAW AMM 33-51-38. OPS CHECK GOOD.

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