# SDR DXTA2026100810064

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2026
- Submitted: October 8, 2026
- Operation: Air carrier
- Aircraft: [N475QS](https://openairdocs.org/aircraft/N475QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500790
- Aircraft time: 2,652 hours, 2,081 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Battery
- Part number: 7450LS00
- Part serial: 007398
- Condition: Faulty
- 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/DXTA2026100810064

## Discrepancy

DURING PRE FLIGHT, THE EMERGENCY LIGHTS WERE TESTED. THE LIGHTS REMAINED ON IN THE ARM POSITION.   VERIFIED EMER LIGHTS STAY ON WITH EMER LT SWITCH IN ARM POSITION. AFTER TROUBLSHOOTING FOUND AFT EMERGENCY BATTERY IS INOP. REMOVED AFT EMERGENCY BATTERY PN#7450LS-00 SN# 007398 IAW PHENOM 300 AMM 33-52-01-000-801-A INSTALLED 'REPAIRED' AFT EMERGENCY BATTERY PN#450LS-00 SN# 007015 (LAST F/T PERFORMED JU/10/2026 REF EEJS WO# W26689) IAW PHENOM 300 AMM 33-52-01-400-801-A.  PERFORMED SATISFACTORY BATTERY OPS TEST OF EMERGENCY BATTERY IAW AMM 33-52-01-710-801-A. PERFORMED SATISFACTORY OPS TEST OF THE EMERGENCY LIGHTS IAW AMM 33-52-00-710-801-A.

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