As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT LANDED AND GEAR DOOR WARNING LIGHT CAME ON. PILOT CHECKED GEAR DOORS AND THEY COULD BE OPERATED BY HAND. MAINTENANCE WAS CONTACTED AND THE GEAR DOOR ACTUATOR TUBE WAS FOUND 3/4 CRACKED AROUND THE CIRCUMFERENCE. MAINTENANCE REPLACED THE GEAR DOOR ACTUATOR TUBE. THE TUBE WAS BROKEN THE REMAINING WAY IN ORDER TO REPLACE.