What was found
DURING APPROACH TO PILOT SELECTED LG TO THE EXTEND POSITION. LANDING POSITION INDICATORS DID NOT ILLUMINATE. PILOT PERFORMED TEST OF LG WARNING HORN SYS, HORN PERFORMED NORMAL. PILOT RECEIVED VERIFICATION FROM TOWER THAT THE LG APPEARED DOWN. AN EMER WAS DECLARED & THE PILOT LANDED WITHOUT INCIDENT. TROUBLESHOOTING REVEALED POPPED LG POSITION INDICATOR LIGHT CB. PUSHED IN CB & PERFORMED OPERATIONAL CHECK OF INDICATOR LIGHTS & LG SYS. ALL OPERATIONAL CHECKS WERE NORMAL, COULD NOT DUPLICATE DISCREPANCY.