A reassuring peek behind the scenes in this air- minded age for those travelers who regard the briefest flight as a brush with death, this guided tour starts in Kansas City where TWA's global and domestic aircraft check in every nine months for a ""health and beauty treatment"". After four such check-ups an aircraft has been completely rebuilt. There, engines are dismantled, each part is cleaned in a ""dishwasher"" and is then subjected to a Magnaflux test to detect deep-seated or hidden cracks or flaws. Any lingering apprehensions about safety precautions are dispelled as the reader checks on training for flight crews. The physical standards governing pilot selection, the educational program undertaken by businesses (""Never call an engine a motor"") and the final vicarious Trans-Atlantic flight in the nose of a ship constitute a positive attitude-builder toward flying. For young people interested in air-borne careers, this should be of interest.