What was found
CLT - FLT 980 - ON APPROACH TO CLT, CREW DID NOT GET ANY LIGHT INDICATION (RED OR GREEN) WHEN THE GEAR WAS SELECTED DOWN, BUT DID GET THE WARNING HORN. THE CREW DID A GO-AROUND AND RECYCLED THE GEAR. CREW THEN RECEIVED ALL GREEN LIGHTS FOR THE GEAR AND NO WARNING HORN. MAINTENANCE CHECKED OUT THE LANDING GEAR SYSTEM AND DID NOT FIND A PROBLEM. THE LANDING GEAR LEVER RELAY WAS REPLACED AS A PRECAUTION. (M)