# SDR DXTA2026021606908

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 15, 2026
- Submitted: February 16, 2026
- Operation: Air carrier
- Aircraft: [N529QS](https://openairdocs.org/aircraft/N529QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0309
- Aircraft time: 4,778 hours, 3,095 cycles
- System (JASC): [5270 · Door Warning System](https://openairdocs.org/jasc/5270)
- Part: Proximity Sensor
- Part number: S28001257
- Condition: Faulty
- Location: Zone 800
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026021606908

## Discrepancy

DURING CRUISE THE CABIN DOOR OPEN CAS MESSAGE APPEARED FOLLOWED BY THE CHECK DOORS CAS MESSAGE. WE FOLLOWED THE QRH AND CALLED MAINTENANCE. WE AGREED TO DIVERT. UPON SHUTDOWN, WE DELAYED OPENING THE DOOR AND FEEL LIKE WE COULD ONLY RELIABLY SEE ONE DOOR PIN FLAG SHOWING LATCHED. CORRECTIVE ACTION: COMPLIED WITH REMOVAL OF FWD PROXIMITY SENSOR (S1) DUE TO SUSPECTED FAULTY SENSOR AND INSTALLATION OF A NEW FWD PROXIMITY SENSOR (S1) PERFORMED OPS CHECKS, OPS CHECKS ARE GOOD. IAW CE 680A AMM 52-70-10. NO DEFECTS NOTED. P/N ON / OFF: S2800-1257. NSN.

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