# SDR DXTA2025072804377

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 27, 2025
- Submitted: July 28, 2025
- Operation: Air carrier
- Aircraft: [N419QS](https://openairdocs.org/aircraft/N419QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500461
- Aircraft time: 6,663 hours, 5,288 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 7450LS0O
- Part serial: 007015
- Condition: Defective
- Location: Zone 200
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2025072804377

## Discrepancy

AFTER ENGINE START, ALL CABIN EMERGENCY SIGNS AND LIGHTS WERE ILLUMINATED WITH THE EMER LIGHT SWITCH IN ARM POSITION. REPLACED DEFECTIVE NR 1 EMERGENCY POWER SUPPLY  WITH CUSTOMER SUPPLIED "TESTED" POWER SUPPLY. REPLACED DEFECTIVE NR 2 EMERGENCY POWER SUPPLY WITH CUSTOMER SUPPLIED "TESTED" POWER SUPPLY.  PERFORMED SUCCESSFUL OPERATIONAL CHECK. ALL REF AMM 33-52-01.

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