# SDR DXTA2026020406764

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2026
- Submitted: February 4, 2026
- Operation: Air carrier
- Aircraft: [N427QS](https://openairdocs.org/aircraft/N427QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500484
- Aircraft time: 6,400 hours, 4,935 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 7450LS00
- Part serial: 007486
- Condition: Defective
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026020406764

## Discrepancy

CABIN EMERGENCY LIGHTS FLICKER WITH EMER LT SWITCH IN THE ARM AND ON POSITION CORRECTIVE ACTION: T/S TO FAULTY #2 BATTERY PACK, MCC REQUESTED R&R OF BOTH FWD AND AFT EMERGENCYBATTERIES. GAINED ACCESS TO #2 BATTER: REMOVING AFT WALL, AC CONDENSOR SHROUD, AND OUTFLOW VALVE SHROUDING. R&R AFT EMERGENCY BATTERY W/ REPAIRED UNIT. REINSTALLED ACCONDENSER SHROUD, OUTFLOW VALVE SHROUD, AND AFT WALL TO ORIGINAL CONFIGURATION.TEMPORARILY REMOVED PILOT AND COPILOT SEATS TO GAIN ACCESS TO #1 EMER BATTERY. R&R #1EMERGENCY BATTERY W/ REPAIRED UNIT, REINSTALLED BOTH SEATS AND ACCESS PANEL TOORIGINAL CONFIGURATION, VERIFIED BOTH SEATS OPERATE AS DESIGNED. PERFORMED OPS CHECK OF BOTH EMERGENCY BATTERIES AND OPS CHECK WAS GOOD. C/W EMB 505 AMM 33-52-01. (BAK).

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