What was found
ON APPROACH WITH GEAR SELECTED TO THE DOWN POSITION, THE RIGHT MAIN GEAR FAILED TO INDICATE DOWN AND LOCKED. GEAR WAS RECYCLED AND ALL THREE GREEN GEAR INDICATION LIGHTS INDICATED NORMAL. AIRCRAFT LANDED WITHOUT INCIDENT. TROUBLESHOT THE RIGHT GEAR INDICATION SYSTEM. REPLACED OLD TYPE SENSOR WITH NEW TYPE SENSOR, OPERATIONAL CHECK OF LANDING GEAR INDICATION SYSTEM CHECKED OK.