"Aeronautics" means transportation by aircraft; the operation, construction, repair, or maintenance of aircraft, aircraft power plants and accessories, including the repair, packing, and maintenance of parachutes; the design, establishment, construction, extension, operation, improvement, repair, or maintenance of airports, restricted landing areas, or other air navigation facilities, and air instruction.

(from Ch. 15 1/2, par. 22.2)

(Source: Laws 1945, p. 335.)