# SDR 4VAA20211216003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 2021
- Submitted: January 27, 2022
- Operation: Air carrier
- Aircraft: N276SK
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145348
- Aircraft time: 34,543 hours, 29,152 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Inverter
- Part number: 78241
- Part serial: 495605
- Condition: Failed
- Location: Zone 100
- Stage of operation: IN
- How discovered: V
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4VAA20211216003

## Discrepancy

DURING INSPECTION, THE EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE AT ROWS THREE AND FOUR. MAINTENANCE REPLACED THE NUMBER 2 EMERGENCY LIGHT BATTERY. OPERATIONAL CHECKS FAILED. MAINTENANCE THEN REPLACED THE NUMBER 3 INVERTER. OPERATIONAL CHECKS WERE GOOD WITH NO FURTHER DEFECTS NOTED.                   ****THE FINAL CORRECTIVE ACTION IS BEING SUBMITTED AS A SUPPLEMENT TO THE ORIGINAL REPORT FILED ON 12/17/21. PART INFORMATION HAS ALSO BEEN UPDATED.

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