As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NOSE LANDING GEAR AMBER LIGHT REMAINED ILLUMINATED AFTER TAKEOFF. *S/D* FOUND LANDING GEAR HAD HEAVY ACCUMULATION OF ICE. CLEANED GEAR AND SENSOR. JACKED AIRCRAFT AND CYCLED GEAR SEVERAL TIMES. NOSE GEAR INDICATION NORMAL. THIS AIRCRAFT HAS NOT HAD ANY LANDING GEAR INDICATION PROBLEMS SINCE THE ICE WAS REMOVED.