What was found
ON INITIAL GEAR RETRACTION AND UPLATCH CHECK, GEAR UNSAFE LIGHT AND GEAR DOOR NOT LATCHED LIGHT WERE ON. CYCLED GEAR SEVERAL TIMES, NO CHANGE. ACCOMPLISHED ABNORMAL PROCEDURES, CONFIRMED LEFT MLG DOOR NOT LATCHED. RESTRICTED AIRSPEED TO .65 MACH AND CONTINUED TO ILN. FOUND GEAR DOOR UPLATCH CAM WORN FOR LEFT GEAR. REPLACED DOOR ROLLER CAM. SYSTEM OPS CHECKED GOOD IAW DC 8 MM.