What was found
ON FLIGHT 4344 THE CREW REPORTED THAT ON APPROACH AFTER GEAR EXTENDED A NOISE WAS HEARD FROM FORWARD OF THE RUDDER PEDALS. SOUNDED LIKE BUMPING ON THE INSIDE OF THE PLANE. THE CREW DECLARED AN EMERGENCY AND PERFORMED A FLY-BY SO THE TOWER COULD INSPECT. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE NOISE WAS NOT CONTINUOUS AND HEARD ONCE DURING TAXI WHEN WE WENT OVER A POT HOLE. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NOSE LANDING GEAR DOWN LOCK PROXIMITY SWITCHES IAE EMB 145 AMM 32-61-02. THE OPERATIONAL CHECK WAS GOOD. NO DEFECTS NOTED AT THIS TIME. THE AIRCRAFT WAS RETURNED TO SERVICE.