As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER DEPARTURE FROM YMX, THE TRUCK LIGHT CAME ON, NORMAL PROCEDURES WHERE NOT TO RETRACT THE GEAR, CREW DUMPED FUEL AND RETURNED TO BASE. FOUND TRUCK SWITCH AT FAULT, COMPLETE ACTUATOR REP LACED AND AIRCRAFT RELEASED FOR A FLIGHT TEST, SYSTEM CHECKED SERVICEABLE AND AIRCRAFT RETURNED TO SERVICE.