What was found
ON APPROACH TO SMF CREW ADVISED TOWER, RECEIVED A RIGHT MAIN LANDING GEAR UNSAFE LIGHT ON GEAR EXTENSION. CREW ACCOMPLISHED TWO TOWER FLY-BYS WITH TOWER CONFIRMING GEAR WAS DOWN. EMERGENCY EQUIPMENT WAS CALLED OUT AS A PRECAUTION. FLIGHT LANDED WITHOUT INCIDENT AND UPON REACHING THE GATE, THE GEAR UNSAFE LIGHT EXTINGUISHED. CREW ADVISED THAT NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE RIGHT MAIN LANDING GEAR UPLOCK ACTUATOR BY-PASSING. REMOVED AND REPLACED ACTUATOR IN ASSOCIATION WITH R4M32010. OPERATIONAL CHECK GOOD. CYCLED GEAR. NO DEFECTS NOTED.