# SDR AALA202311206869

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 4, 2023
- Submitted: November 20, 2023
- Operation: Air carrier
- Aircraft: [N551UW](https://openairdocs.org/aircraft/N551UW), registered now
- Make and model: Airbus A320*
- Aircraft serial: 4940
- Aircraft time: 38,577 hours, 14,911 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321431
- Condition: No Test
- Location: Zone 200 - Fuse
- 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/AALA202311206869

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: EMERGENCY POWER SUPPLY UNIT 10WL FAILED SYSTEM TEST. **ORIGINAL REPORT WAS AALA202311064794: MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT 10WL AND BATTERY (AALA202311206869) PER AMM 33-51-38. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.

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