# SDR DXTA2025102705435

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 24, 2025
- Submitted: October 27, 2025
- Operation: Air carrier
- Aircraft: [N476QS](https://openairdocs.org/aircraft/N476QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500795
- Aircraft time: 1,387 hours, 1,102 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 7450LS00
- Part serial: 007179
- Condition: No Test
- Location: Zone 200
- Stage of operation: IN
- How discovered: V
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2025102705435

## Discrepancy

EMERGENCY LOGHTS STAY ON WHEN SWITCHES TO ARMED POSITION EVEN AFTER START. CORRECTIVE ACTION: GAINED ACCESS TO EMER LIGHT BATTERY AND REPLACED IAW EMB505E AMM 33-52-01. EMER LIGHT BATT #1 & #2 INSTALLED CAPACITY CHECK DATED 15 OCT 25. PERFORMED EMER LIGHTS CHECK GOOD IAW EME505E AMM 33-52-00, WHEN EMER LIGHT SWITCH SELECTED TO ARM, EMER LIGHTS REMAIN OFF. CLOSED ACCESS TO EMER LIGHT BATT #2, REINSTALED RH AFT LAV PARTITION IAW EMB505E AMM 25-27-05.

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