# SDR CALA2018012000254

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2018
- Submitted: January 21, 2018
- Operation: Air carrier
- Aircraft: [N38950](https://openairdocs.org/aircraft/N38950), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36401
- Aircraft time: 15,491 hours, 1,457 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 100260201
- Part serial: 74594357
- Condition: Inoperative
- Location: Emergency Lights
- Part time: 15,330 hours, 1,423 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2018012000254

## Discrepancy

MAIN AISLE OVERHEAD EMERGENCY LIGHTS ROWS 17, AND 35  INOPERATIVE. REPLACED THE CONTROL UNIT BATTERY AND TESTED OK IAW 33-51-07-01 A-520.

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