# SDR AALA2020051189009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 7, 2020
- Submitted: May 11, 2020
- Operation: Air carrier
- Aircraft: [N822AN](https://openairdocs.org/aircraft/N822AN), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 40642
- Aircraft time: 14,630 hours, 1,492 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 100260201
- Part serial: ST18016307
- Condition: Faulted
- Location: Cabin
- 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/AALA2020051189009

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE - EMERGENCY LIGHT QUICK TEST, FAULT 33-11413, 7H STOW BIN. REMOVED AND REPLACED WELS (WIRELESS EMERGENCY LIGHT SYSTEM) BATTERY UNIT (WBU) 11.1, PER AMM 33-51-07, QUICK TEST PASSED AND MESSAGE CLEARED.

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