# SDR AALA202301104197

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 20, 2022
- Submitted: January 10, 2023
- Operation: Air carrier
- Aircraft: [N534UW](https://openairdocs.org/aircraft/N534UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 3989
- Aircraft time: 45,410 hours, 16,838 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 154232
- Condition: Faulted
- Location: Emergency Lgihts
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202301104197

## Discrepancy

AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT (13WL) FAULTING EMERGENCY POWER SUPPLY UNIT OR EMERGENCY POWER SUPPLY UNIT BATTERY.   REMOVED AND REPLACED EMERGENCY POWER SUPPLY (13WL). REMOVED AND REPLACED 3 AFT ESCAPE SLIDES.

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