# SDR AALA201711199008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 17, 2017
- Submitted: November 21, 2017
- Operation: Air carrier
- Aircraft: [N164NN](https://openairdocs.org/aircraft/N164NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6909
- Aircraft time: 4,613 hours, 1,739 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 321430
- Condition: Faulted
- Location: Emergency Lights
- 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/AALA201711199008

## Discrepancy

DURING EMERGENCY POWER SUPPLY UNIT SYSTEM TEST, BATTERY 10WL FAULTED.  REPLACED THE BATTERY IAW AMM 33-51-38.

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