# SDR AALA202107198618

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2021
- Submitted: July 19, 2021
- Operation: Air carrier
- Aircraft: [N578UW](https://openairdocs.org/aircraft/N578UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6035
- Aircraft time: 23,436 hours, 9,326 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Failed
- Location: Zone 200 - Fuse
- 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/AALA202107198618

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: 11WL EMERGENCY POWER SUPPLY UNIT BATTERY FAILED TEST. REMOVED AND REPLACED 11WL EMERGENCY POWER SUPPLY UNIT BATTERY PACK PER AMM 33-51-38.

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