g. 14,758 (July 25, 1972). Adopting release for amendments to what is now FAR Part 91.501, 38 Fed. Reg. 19,024 (July 17, 1973). Interpretations in Joseph D. Kuchta, Federal Aviation Decisions (New York, 1973): 1977-5; 1979-18 (major enterprise test inapplicable because air transportation was the sole business o