# SDR CALA2024102900957

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2024
- Submitted: October 30, 2024
- Operation: Air carrier
- Aircraft: [N29978](https://openairdocs.org/aircraft/N29978), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 66137
- Aircraft time: 21,354 hours, 2,146 cycles
- System (JASC): [5100 · Standard Practices/Structures](https://openairdocs.org/jasc/5100)
- Part: None
- Condition: None
- Location: None
- Stage of operation: NR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2024102900957

## Discrepancy

SET EMERGENCY WELS LIGHT SYSTEM INTO SLEEP MODE FOR MAIN BATTERY DISCONNECTED, REF AMM 33-51-00-04A-510A. REACTIVATED EMERGENCY WELS LIGHT SYSTEM PER AMM 33-51-00-04A-730A.

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