At 09:15 eastern time, a Lake LA-4 exploded as the pilot attempted to start the engine at the Orlando Executive Airport. The two occupants suffered minor injuries but the airplane was destroyed. Preliminary examination showed the explosion occurred in the bilge area underneath and behind the rear seat. The examination also showed that the main fuel tank and associated fuel components are in close proximity to the battery installation. Fuel stains were observed on fuel lines and fittings inside the enclosed fuel system compartments and corrosion was detected on one battery cable.