What was found
AFTER TAKEOFF, AND NORMAL GEAR RETRACTION, GEAR HANDLE CENTERED. GEAR EXTENDED WITH BOTH RED AND GREEN LIGHTS. RAISED HANDLE, GEAR RETRACTED, BUT RED UNSAFE LIGHTS REMAINED ON. GEAR WAS AGAIN EXTENDED AND RETRACTED BUT TOOK EXCESSIVE AMOUNT OF TIME TO RETRACT. REPLACED PC CARD 986 AND PERFORMED RETRACT TEST PER BOEING M/M.