What was found
DURING MY RETURN FLIGHT HOME FROM HNL ON THE APPROACH SEGMENT OF THE FLIGHT I HAD PUT THE FINAL FLAPS DOWN FOR LANDING AND MY GEAR WARNING HORN CAME ON. MY GEAR WAS INDICATING THREE GREEN BUT THE HORN WOULD NOT STOP. I ELECTED TO GO AROUND AND TRY ANOTHER APPROACH. THE SAME THING HAPPENED SO I DECIDED TO RETURN TO HNL. DURING THE MISSED APPROACH FOLLOWING NORMAL PROCEDURES I APPLIED MAX POWER. AT 100 KNOTS I RETRACTED THE FLAPS TO ZERO AND PUT THE GEAR UP WHEN I HAD A POSITIVE RATE. THE GEAR HORN TURNED OFF WHEN I PUT THE FLAPS ALL THE WAY UP.