# SDR DALA2017050403722

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2017
- Submitted: May 10, 2017
- Operation: Air carrier
- Aircraft: [N302DN](https://openairdocs.org/aircraft/N302DN), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 7031
- Aircraft time: 2,502 hours, 1,973 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Faulted
- Location: Cabin
- Stage of operation: IN
- How discovered: C
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2017050403722

## Discrepancy

DURING EPSU SYS TEST FOUND FAULT 335100 BAT/EPSU (12WL) EXT R. REPLACED BATTERY AT (12WL).

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