(1) a. The term “aircraft” means any contrivance now known or hereafter invented, used, or designed for navigation of or flight in the air, except a parachute or other contrivance designed for such navigation but used primarily as safety equipment.
(2) b. The term “airman” means any individual (including the person in command, and any pilot, mechanic or member of the crew) who engages in the navigation of aircraft while under way, and any individual who is in charge of the inspection, overhauling or repairing of aircraft.
(3) c. The term “passenger” includes any person riding in an aircraft, but having no part in its operation.