# SDR DXTA2026020206736

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 29, 2026
- Submitted: February 2, 2026
- Operation: Air carrier
- Aircraft: [N645QS](https://openairdocs.org/aircraft/N645QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0194
- Aircraft time: 7,460 hours, 4,959 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Downlock Switch
- Part number: 603701W
- Condition: Defective
- Location: Zone 700
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DXTA2026020206736

## Discrepancy

AFTER TAKEOFF AND SELECTING THE GEAR UP, RECEIVED AN AMBER GEAR DISAGREE N CAS MESSAGE. THE NOSE GEAR REMAINED DOWN AND LOCKED.  AFTER TROUBLESHOOTING, R & R FAULTY NLG DOWNLOCK SWITCH. PERFORMED RIGGING & OPS CHECKING GOOD WITH 15 GEAR SWINGS. ALL OPS CHECKED GOOD.

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