# SDR AALA202408215641

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2024
- Submitted: August 21, 2024
- Operation: Air carrier
- Aircraft: [N876AL](https://openairdocs.org/aircraft/N876AL), registered now
- Make and model: Boeing 787-8
- Registry model: [Boeing 787-8](https://openairdocs.org/model/boeing-787-8) (OpenAirDocs)
- Aircraft serial: 65996
- Aircraft time: 8,449 hours, 1,125 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Control Unit
- Condition: Faulty
- Location: Zone 200
- 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/AALA202408215641

## Discrepancy

AIRCRAFT WAS GROUNDED: WELS BATTERY NNEDS TO BE REPLACE, UNABLE TO COMPLETE DO TO AIRCRAFT NOT TAKING DB/OPS SOFTWARES FOR DOOR 1 LEFT HAND PRIME WELS CONTROL UNIT. REPLACED PRIME WELS CONTROL UNIT AT L1 DOOR AND TESTED WELS GOOD. PER AMM 33-51-07.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.