# SDR CALA2018020900540

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2018
- Submitted: February 10, 2018
- Operation: Air carrier
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 34821
- Aircraft time: 20,926 hours, 2,575 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Control Unit
- Condition: Malfunctioned
- Location: Emergency Lights
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2018020900540

## Discrepancy

DURING AN EMERGENCY LIGHT SWITCH TEST IAW DMC-B787-A-33-51-00-00E-320A-A. FOUND ONE INOPERATIVE LIGHTED SIGN AT THE L2 DOOR.  REPLACED THE CONTROL UNIT M3351037 IAW DMC-B787-A-33-51-07-01A-720A-A.  ALL LIGHTS CHECKED GOOD.

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