# SDR AALA202411184016

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 16, 2024
- Submitted: November 18, 2024
- Operation: Air carrier
- Aircraft: [N154UW](https://openairdocs.org/aircraft/N154UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 5644
- Aircraft time: 34,977 hours, 14,586 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Faulty
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202411184016

## Discrepancy

AIRCRAFT WAS GROUNDED: EMERGENCY LIGHTS CAME ON AFTER PUSH. RETURN TO GATE. AFTER EPSU BITE TEST IAW AMM 33-51-00 FOUND FAULT MESSAGE BAT/EPSU 10WL. REMOVED AND REPLACED EPSU 10WL BATTERY.

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