# SDR DXTA2026012006593

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 19, 2026
- Submitted: January 20, 2026
- Operation: Air carrier
- Aircraft: [N374QS](https://openairdocs.org/aircraft/N374QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500289
- Aircraft time: 8,396 hours, 6,609 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery Pack
- Part number: 7450LS00
- Part serial: 007523
- Condition: Faulted
- 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/DXTA2026012006593

## Discrepancy

EMER LIGHT NOT ARM CAS ON WITH SWITCH IN ARM, ENGINES RUNNING AND NO GPU. GROUND RESET PROCEDURE UNSUCCESFUL.  REVIEWED SL505-33-0005 REV 5 "EMER LIGHT T/S" AND FOUND THAT BOTH BATTERY PACKS ARE CAUSING THE ISSUE CONFIRMED 'G' SWITCH NOT TRIPPED. REMOVED FWD EMER LIGHT BATT PACK AND INSTALLED A REPAIRED UNIT . REMOVED AFT EMER LIGHT BATT PACK  AND INSTALLED A REPAIRED UNIT. COMPLETED OPS AND CHARGING CHECKS AS REQUIRED WITH NO FAULTS. WORK DONE IAW AMM 33-52-01.

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