# SDR DXTA2026091509684

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2026
- Submitted: September 16, 2026
- Operation: Air carrier
- Aircraft: [N439QS](https://openairdocs.org/aircraft/N439QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500542
- Aircraft time: 6,039 hours, 4,727 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 7450LS00
- Part serial: 005648
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026091509684

## Discrepancy

EMERGENCY LIGHTS ARE REMAINING ILLUMINATED WITH SWITCH IN THE ARM POSITION. CONFIRMED. TROUBLESHOT IAW FIM 33-50-00-810-801-A. REMOVED CREW SEATS IAW AMM 25-11-01 FOR ACCESS. REMOVED FLOOR PANEL 223CLF FOR ACCESS TO NR 1 BATTERY. REMOVED LAV PANEL242AZ TO ACCESS NR 2 BATTERY. ISOLATED NR 2 BATTERY AND PERFORMED CHK IN ARM POSITION, NO CHANGE NOTED. ISOLATED NR 1 EMERGENCY BATTERY & PERFORMED CHECK IN ARM, SYSTEM OPS NORMALLY. R & R NR 1 BATTERY WITH REPAIRED UNIT IAW AMM 33-52-01. PERFORMED  EMERGENCY LIGHT OPS CHK IAW  AMM 33-52-00. OPS CHKD GOOD. CHARGED BATTERIES FOR 90 MINS IN ARM POSITION IAW AMM 33-52-01. CLOSED LAV PANEL 242AZ & COCKPIT FLOOR 223CLF. REINSTALLED CREW SEATS IAW AMM 25-11-01.

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