As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED NOSE GEAR UNSAFE WARNING AFTER VARIOUS ATTEMPTS AT GEAR EXTENSION. GREEN LIGHT CAME ON AT TOUCHDOWN. VERIFIED NOSE GEAR DRAG BRACE SWITCH PLUNGER WAS "STICKY" AND WAS DEFLECTING STRIKER PLATE INSTEAD OF DEPRESSING SWITCH PLUNGER. REPLACED FAILED SWITCH. (K)