# SDR AALA202411119595

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 8, 2024
- Submitted: November 11, 2024
- Operation: Air carrier
- Aircraft: [N165US](https://openairdocs.org/aircraft/N165US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1431
- Aircraft time: 75,636 hours, 29,382 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32145410
- Part serial: 1693
- Condition: Faulty
- Location: Zone 200
- Part time: 69,749 hours, 29,384 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/AALA202411119595

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: DURING OPS TEST OF EMERGENCY LIGHT SYSTEM, FOUND AFT 13WL EPSU FAULTING. REMOVED AND REPLACED EPSU.

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