What was found
ON APPROACH THE RIGHT MAIN LANDING GEAR ANNUNCIATOR WAS VERY DIM. CREW CYCLED THE LANDING GEAR AND LIGHT CAME ON BRIGHT. A GO AROUND WAS EXECUTED. TOWER NOTIFIED EMERGENCY VEHICLES TO STANDBY AS A PRECAUTION. LANDING WAS UNEVENTFUL. MAINTENANCE TROUBLESHOT THE DISCREPANCY TO AN INTERMITTENT RIGHT MAIN LANDING GEAR ANNUNCIATOR LIGHT BULB. REPLACED BULB. CYCLED GEAR SEVERAL TIMES WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.