What was found
UNSATISFACTORY UPLATCH CHECK DEPARTING. LEFT MAIN LANDING GEAR GREEN LIGHT ON BRIGHT, NO GEAR DOOR OPEN LIGHT. RECYCLED LANDING GEAR, SECOND UPLATCH CHECK WAS SATISFACTORY. LUBED LEFT MAIN LANDING GEAR AND LEFT MAIN LANDING GEAR UPLATCH MECHANISM. PERFORMED OPERATIONAL CHECK OF UPLATCH SYSTEM, OPS CHECK GOOD IAW DC-9 SUPP MM 32-60-00.