# SDR AALA202201274272

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 27, 2022
- Submitted: January 27, 2022
- Operation: Air carrier
- Aircraft: [N524UW](https://openairdocs.org/aircraft/N524UW), registered now
- Make and model: Airbus A300*
- Aircraft serial: 3977
- Aircraft time: 42,661 hours, 15,620 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 32146210
- Part serial: 132541
- Condition: None
- Location: Zone 200 - Fuse
- Part time: 42,661 hours, 15,620 cycles
- 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/AALA202201274272

## Discrepancy

AIRCRAFT WAS GROUNDED: WHILE ACCOMPLISHING PS CHECK FOUND CLASS 1 FAULT ON EMERGENCY POWER SUPPLY UNIT SYSTEM TEST FOR EMERGENCY POWER SUPPLY UNIT FIN 12WL. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT FIN 12WL PER AMM 33-51-28.

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