# SDR DXTA2025120205907

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 30, 2025
- Submitted: December 2, 2025
- Operation: Air carrier
- Aircraft: [N487QS](https://openairdocs.org/aircraft/N487QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500841
- Aircraft time: 967 hours, 787 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 7450LS00
- Part serial: 007572
- Condition: Defective
- Location: Zone 200
- Part time: 967 hours, 787 cycles
- 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/DXTA2025120205907

## Discrepancy

IN FLIGHT WITH EMER LT SWITCH IN ARM POSITION, EMER LIGHTS STAY ON, ABOUT 45MIN INTO THE FLIGHT THEY BEGAN FLASHING DUPLICATED FAULT & FOUND BOTH OF THE EMERGENCY BATTERY PACKS WILL NO LONGER HOLD A CHARGE. REMOVED DEFECTIVE UNITS & INSTALLED OPERATOR SUPPLIED EMERGENCY LIGHTS BATTERY PACKS IAW AMM 33-52-01. ALL OPS CHECKS ARE GOOD. NO FURTHER DEFECTS NOTED.

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