What was found
LT MAIN LANDING GEAR UNSAFE INDICATION WITH GEAR HANDLE UP. CYCLED GEAR DOWN, INDICATION OK. UP UNSAFE AGAIN. GEAR DOOR LIGHT OUT TILL FL270 THEN INTERMITTENT. ALSO, AUTOSPOILER FAIL MSG ON EOAP. DIVERTED TO DFW. REPLACED LEFT MAIN LANDING GEAR ACT, SWUNG GEAR. OPERATION NORMAL AND ALL INDICATION NORMAL.