SDR DXTA2026020206736

Service difficulty report · Downlock Switch · Cessna 680A

Difficulty date: January 29, 2026
Submitted: February 2, 2026
Operation: Air carrier
Aircraft: N645QS
Make and model: Cessna 680A
Aircraft serial: 680A0194
Aircraft time: 7,460 hours, 4,959 cycles
System (JASC): 3260 · Landing Gear Position and Warning
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

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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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