# SDR DXTA2026060108260

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2026
- Submitted: June 2, 2026
- Operation: Air carrier
- Aircraft: [N428QS](https://openairdocs.org/aircraft/N428QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500485
- Aircraft time: 6,510 hours, 5,066 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Switch
- Part number: 8121183ZGE22
- Condition: Defective
- Location: Zone 200
- Stage of operation: TX
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026060108260

## Discrepancy

UPON PARKING AND DOING THE SHUTDOWN CHECKLIST NOTICED SOME OF THE EMER LIGHTS STAYED ON WHEN THE SWITCH WAS IN THE OFF/ARM POSITION. IF YOU TURN THE SWITCH TO THE ON POSITION ALL EMER LIGHTS COME ON. THEY EXTINGUISH AFTER 5 MINUTES. DISCOVERED MAIN ENTRY DOOR COURTESY LIGHT SWITCH STUCK IN DEPRESSED POSITION.  COCKPIT COURTESY LIGHT SWITCH OPERATIONAL. ADJUSTED MED COURTESYLIGHT SWITCH AND AFFECTED LIGHTS NO LONGER ACTIVATING. MED COURTESYLIGHT SWITCH INTERNALLY BROKEN AND REQUIRES REPLACEMENT. NOTIFIED MCC, PLACED SWITCH ON ORDER, AND ISSUED. GAINED ACCESS TO FAULTYSWITCH AND SOLDERED IN NEW SWITCH. REPORTED LIGHTS NO LONGERCOMING ON UNLESS COMMANDED. CHARGED EMER BATTERIES AND COMPLIED WITH EMER LIGHTS OP CK WITH NO ISSUES. SYS OP CK GOOD IN REF TO EMB-505S AMM 33-26-00. SWITCH PN: 8121183ZGE22 / SN: N/A.

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