What was found
ON TOUCHDOWN, RIGHT MAIN LANDING GEAR WARNING LIGHT CAME ON. FELT VIBRATION ON RIGHT SIDE. INITIATED A GO-AROUND. *S/D* FOUND RT MAIN LANDING GEAR DOWNLOCK SENSOR ACTUATOR MISSING BUSHING. REPLACED BUSHING AND PERFORMED DOWNLOCK SENSOR AND LANDING GEAR POSITION INDICATING AND WARNING SYSTEM TEST PER MAINTENANCE MANUAL. SWUNG GEAR NUMEROUS TIMES AND OPS CHECKS GOOD. ALSO, PERFORMED MANUAL GEAR EXTENSION.