As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORTED THAT AFTER TAKEOFF THEY RETRACTED THE GEAR AND THE GEAR HANDLE REMAINED ILLUMINATED. MAINTENANCE TROUBLESHOT THE SYSTEM AND INSPECTED AND CLEANED THE NOSE GEAR UP LOCK SWITCH AND OPS CK WAS GOOD IAW MM 32-60-00. PERFORMED EXTENSION/RETRACTION TEST.