# SDR AALA202108311669

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2021
- Submitted: August 31, 2021
- Operation: Air carrier
- Aircraft: [N805AN](https://openairdocs.org/aircraft/N805AN), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 40623
- Aircraft time: 21,858 hours, 2,831 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Discharged
- Location: Emergency Lights
- 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/AALA202108311669

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: FOUND MAINTENANCE MESSAGE 33-11408, WELS CONTROL UNIT #8 BATTERY DEGRADED. REPLACED BATTERY PER AMM 33-51-07.

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