# SDR DXTA2026070708691

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2026
- Submitted: July 7, 2026
- Operation: Air carrier
- Aircraft: [N353QS](https://openairdocs.org/aircraft/N353QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500263
- Aircraft time: 8,761 hours, 6,874 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Proximity Switch
- Part number: 50538876403
- Part serial: F038468911
- Condition: Failed
- Location: Zone 800
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026070708691

## Discrepancy

RED WARNING CAS DOOR PAX OPEN CAME ON MULTIPLE TIMES WITHIN FLIGHT. ONCE AT FL380, ONCE AT FL400, BOTH TIME IT WENT AWAY WITHIN A COUPLE MINUTES. FOLLOWED THE QRH AND DESCENDED TO 10,000FT WHERE THE CAS MESSAGE CAME ON AGAIN.  REMOVED AFT LOWER MED MICROSWITCH AND INSTALLED CUSTOMER SUPPLIED, NEW AFT LOWER MED MICROSWITCH. OPS CHECKS GOOD.

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