# SDR AALA202410148472

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 13, 2024
- Submitted: October 14, 2024
- Operation: Air carrier
- Aircraft: [N997AA](https://openairdocs.org/aircraft/N997AA), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7349
- Aircraft time: 22,693 hours, 8,952 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Fault Message
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202410148472

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: DURING EMERGENCY POWER SUPPLY UNIT SYSTEM TEST FOUND EMERGENCY POWER SUPPLY UNIT BATTERIES FAULT FOR 10WL, 11WL, 12WL, AND 13WL. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT BATTERIES FOR 10WL (AALA202410146895), 11WL (AALA202410149511), 12WL, AND 13WL (AALA202410149427).

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