# SDR AALA202010309021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 29, 2020
- Submitted: October 30, 2020
- Operation: Air carrier
- Aircraft: [N717AN](https://openairdocs.org/aircraft/N717AN), registered now
- Make and model: Boeing 777323ER
- Aircraft serial: 31543
- Aircraft time: 30,406 hours, 3,451 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Failed
- Location: Lt Overwing
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202010309021

## Discrepancy

AIRCRAFT WAS GROUNDED.  L3 OVERWING BACK UP BATTERY FAILED.  REPLACED BATTERY, PER AMM 52-12-24.

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