# SDR CALA2018011200118

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 11, 2018
- Submitted: January 13, 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: 15,376 hours, 1,448 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 100260201
- Condition: Failed
- 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/CALA2018011200118

## Discrepancy

EMERGENCY LIGHTS IN BOTH SECTIONS OF BUSSINESS CLASS ARE INOPERATIVE.  FOUND BATTERY PACKS AT THE WCU 21.1, 23.2 AND 24.1 FAILED.  REPLACED THE BATTERIES IAW AMM 33-51-07-02B. ALL SEAT MOUNTED EMERGENCY LIGHTS NOW OPERATE NORMAL.

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