# SDR CALA2018021000582

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 10, 2018
- Submitted: February 11, 2018
- Operation: Air carrier
- Aircraft: [N27958](https://openairdocs.org/aircraft/N27958), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 36406
- Aircraft time: 11,817 hours, 1,120 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 100260201
- Part serial: 5234
- Condition: Faulty
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2018021000582

## Discrepancy

DURING AN EMERGENCY LIGHTS OPERATIONAL CHECK,  EMERGENCY LIGHT INOPERATIVE.  REPLACED THE CONTROL UNIT M3351033 AND BATTERY IAW AMM 33-51-07. EMERGENCY LIGHTS OPS CHECKED GOOD.

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