# SDR AALA20170125006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 23, 2017
- Submitted: January 25, 2017
- Operation: Air carrier
- Aircraft: [N811AB](https://openairdocs.org/aircraft/N811AB), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 40629
- Aircraft time: 5,023 hours, 527 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Control Unit
- Part number: 100260103
- Part serial: 1165678
- Condition: Faulty
- Location: Zone 200
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA20170125006

## Discrepancy

AIRCRAFT WAS NOT GROUNDED. L1 DOOR WIRELESS EMERGENCY LIGHTING SYSTEM CONTROL UNIT BATTERY POWER FAILURE DATA MESSAGE. REMOVED AND REPLACED PRIME CONTROL UNIT IAW DMC-B787-A-33-51-07. OPERATIONAL CHECK GOOD.

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