41 Airplane flight instruction; Educational services, namely, conducting classes in the fields of aviation and distribution of training materials in connection therewith; Educational services, namely, conducting classes for pilots, crew and engineers in the field of aviation; Educational services, namely, conducting classes in the field of aviation and distribution of training material in connection therewith; Educational services, namely, conducting classes in the field of aviation; Educational services, namely, providing training of pilots, crew and engineers for certification in the field of aviation; Providing educational demonstrations in the field of aviation; Training in the use and operation of aircraft; Training in the use and operation of aircraft and consultation relating thereto; Training in the use of aircraft