What was found
MIA - FLT 751 - AIR TURNBACK, ON GER RETRACT DOOR NOT LATCHED. LIGHT REMAINS ILLUMINATED. PERFORMED ABNORMAL CHECKLIST 4 TIMES. LIGHT REMAINS ON. TROUBLESHOT, FOUND LEFT MAIN GEAR DOOR SWITCH FAULTY. REMOVED AND REPLACED SWITCH. OPS CHECK NORMAL IAW MM 32-60-0. (M)