# SDR AALA202106219031

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 18, 2021
- Submitted: June 21, 2021
- Operation: Air carrier
- Aircraft: [N817AN](https://openairdocs.org/aircraft/N817AN), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 40635
- Aircraft time: 15,398 hours, 2,176 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Condition: Inoperative
- 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/AALA202106219031

## Discrepancy

AIRCRAFT WAS GROUNDED: EMERGENCY LIGHTING SYSTEM OPERATIONAL CHECK WAS BEEN ACCOMPLISH AND FAULT 33-11409 WAS FOUND ON EXISTING FAULTS STEP B 2 OF CARD # 78T21033001. WELS CONTROL UNIT (AALA202106219021) AND BATTERY REPLACED AT M3351041 (AALA202106219031), CONNECTOR, RESEATED AND SOFTWARE LOADED. NO FAULTS NOTED. ACCOMPLISHED WORK CARD 78T21033001 IAW AMM 33-31-07 & SSM 33-51-10

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