# SDR AALA202304277414

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 24, 2023
- Submitted: April 27, 2023
- Operation: Air carrier
- Aircraft: [N553UW](https://openairdocs.org/aircraft/N553UW), registered now
- Make and model: Airbus A320*
- Aircraft serial: 4960
- Aircraft time: 36,063 hours, 13,916 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Condition: No Test
- Location: Zone 200 - Fuse
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202304277414

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: 3 EMERGENCY POWER SUPPLY UNITS FAILED TEST. MAINTENANCE REPLACED 3 EMERGENCY POWER SUPPLY UNITS PER AMM 33-51-38.

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