# SDR AALA201812149012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2018
- Submitted: December 14, 2018
- Operation: Air carrier
- Aircraft: N953UW
- Make and model: Emb ERJ 190-100 IGW
- Registry model: [EMB ERJ 190-100 IGW](https://openairdocs.org/model/embraer-erj-190-100-igw) (OpenAirDocs)
- Aircraft serial: 19000133
- Aircraft time: 23,647 hours, 19,586 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 340022
- Part serial: 2815
- Condition: Faulted
- Location: Emergency Lights
- Part time: 23,647 hours, 19,586 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201812149012

## Discrepancy

DURING A PREFLIGHT TEST, WHEN SELECTING EMERGENCY LIGHTS ON,  THE EMERGENCY LIGHT BATTERY FAULT EICAS MESSAGE DISPLAYED.  THE AIRCRAFT WAS GROUNDED.  MAINTENANCE REPLACED POWER SUPPLY IAW AMM 33-50-01, AND PERFORMED A SATISFACTORY OPERATIONAL CHECK.

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