Within 24 hours of the accident Catastrophe , the United States Department of Commerce ( the governing Action authority of the CAA ) ordered Request that all Lockheed Super Electras be immediately grounded Motion and that tests be performed Action to confirm that the figures obtained Getting in the aircraft 's original vibration tests were accurate .

Investigators with the United States Department of Commerce 's Civil Aeronautics Authority ( CAA ) , a predecessor organization to both the FAA and the NTSB , determined Deciding that an intense fire had developed Coming_to_be in the cockpit shortly after the aircraft had departed Departing the airport .

The CAA recommended Convincing that the cross-feed fuel system be relocated Removing to allow Preventing_or_letting for easier maintenance and inspection and to reduce Cause_change_of_position_on_a_scale the possibility of a cockpit fire caused Causation by fuel leakage .