# SDR DXTA2026010206355

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2025
- Submitted: January 2, 2026
- Operation: Air carrier
- Aircraft: [N636QS](https://openairdocs.org/aircraft/N636QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0182
- Aircraft time: 7,506 hours, 4,970 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Check Valve
- Condition: Faulted
- 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/DXTA2026010206355

## Discrepancy

AFTER SELECTING GEAR UP ON TAKEOFF, WE RECIEVED A GEAR DISAGREE CAS MESSAGE. THE TWO MAIN GEAR SHOWED UP AND LOCKED HOWEVER THE NOSE GEAR DISPLAYED AN AMBER DN INDICATION WITH THE GEAR HANDLE IN THE UP POSITION. QRH PROCEDURE WAS COMPLIED WITH AND RESULTED WITH THE GEAR INDICATION OF THREE GREEN. WE CONTINUED TO THE DIVERSION AIRPORT AND LANDED SAFELY. NO STEERING ISSUES WERE OBSERVED ON THE TAXI IN AND THE POST FLIGHT INSPECTION DID NOT REVEAL ANY ABNORMALITIES WITH THE GEAR DOOR LINKAGE.   REMOVED LANDING GEAR MANIFOLD CHECK VALVE DUE TO NOSE WHEEL DISAGREE. INSTALLED CUSTOMER SUPPLIED NEW CHECK VALVE IAW AMM 32-30-25. OPS CHECK GOOD.

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