What was found
LAX - ABORTED TAKEOFF - FLT 702 - "C" - WHEN INITIATING TAKEOFF FLIGHT CREW RECEIVED AN AFT CARGO DOOR WARNING LIGHT INDICATION, TAKEOFF WAS ABORTED WITHOUT INCIDENT AND AIRCRAFT RETURNED TO THE GATE. AT THE GATE MAINTENANCE INSPECTED THE AFT CARGO DOOR AND FOUND THE HANDLE WAS NOT FULLY LATCHED. MAINTENANCE SECURED THE HANDLE TO THE LOCKED POSITION AND THE LIGHT EXTINGUISHED, THE DOOR HANDLE WAS CYCLED SEVERAL TIMES AND OPERATIONALLY CHECKED GOOD.