What was found
RAISED GEAR HANDLE AFTER TAKEOFF AND GEAR DID NOT RETRACT. RED LIGHTS CAME ON (UPPER LEFT ONE CAME ON AND THEN WENT OUT). GREEN STAYED. CYCLED GEAR HANDLE DOWN. RED LIGHTS WENT OUT. PLACED HANDLE UP AGAIN WITH SAME RESULTS. ONE MORE ATTEMPT, SAME RESULT. RETURNED FOR LANDING. JACKED AIRCRAFT AND CYCLED GEAR SEVERAL TIMES. LANDING GEAR RETRACTED AND EXTENDED NORMALLY EVERY TIME AND INDICATED CORRECTLY. REPLACED LANDING GEAR CONTROL MODULE. CYCLED GEAR SEVERAL TIMES AND OPS CHECK GOOD.