What was found
(CAN) ON FLIGHT, DURING APPROACH AT FLIGHT LEVEL 2000 NO GREEN LIGHTS (3) ON GEAR DOWN ACTION AND NO GEAR UNSAFE INDICATION. 3 GEARS WERE DOWN AND 3 GREEN LIGHTS NOT ILLUMINATED, CHECK SUPPLEMENT COMPLETED AND GEARS (3) CONFIRMED DOWN VISUALLY, NO FLAPS AND NO THROTTLES HORN SOUNDING, LANDING COMPLETED UNEVENFULL. MX FOUND LOCKPIN PN 240-3150699 STICKING INSIDE THE LANDING GEAR LEVER HOUSING PN 340-8500004-9, CLEANED AND LUBRICATED LOCK PIN ASSY AND TESTED SYS SERVICEABLE.