What was found
AFTER LOWERING LANDING GEAR, HAD 3 RED GEAR LIGHTS IN BOTH MAIN GEAR INDICATIONS AND CONFIG PAGE, ALSO GEAR WARNING HORN AND CAWS, SITUATION STAYED SAME UNTIL 1500' AGL WHEN GO-AROUND EXECUTED, RAISED GEAR HANDLE ON GO-AROUND AND GEAR RETRACTED NORMAL WITH ALL WARNINGS GONE/NO GEAR LIGHTS. EXTENDED GEAR IN PATTERN THEN GEAR DOWN INDICATIONS NORMAL. LANDED NORMAL, NO EMERGENCY DECLARED. TROUBLESHOTING IAW FIM 32-30-03, ALL STEPS CHECKED GOOD. FOUND GEAR HANDLE STICKING, ABLE TO DUPLICATE ON GROUND. CLEANED GEAR CONTROL MECHANISM IAW AMM 32-31-02-7. OPS CHECKED NORMAL ON GROUND.