What was found
(CAN)AFTER TAKEOFF CREW NOTICED R/H MAIN LANDING GEAR LIGHT REMAINED ON, SHORTLY AFTERWARDS MLG FELL OUT OF HOLE. ALTERNATE EXTENSION CARRIED OUT AND RETURNED TO BLOCKS. ON LANDING CREW NOTICED THE UTILITYSYSTEM WAS DELETED OF FLUID, AIRCRAFT TOWED OFF RUNWAY. R/H FORWARD DOOR ACTUATOR WAS LEAKING, REPLACED.