Full FAA Chronology at this link.
19280131: The Aeronautics Branch’s Domestic Air News reported an early instance of airplane noise nuisance. The proprietor of the Cackle Corner Poultry Farm, Garrettsville, Ohio, complained to the Postmaster General that low-flying planes were disrupting egg production. The Postmaster General forwarded the letter to National Air Transport, Inc., the private company operating the New York-Chicago air mail route, suggesting it make a special effort to maintain altitude over Garrettsville.
19410131: CAA established a Standardization Center at Houston, Tex., to promote uniformity in the agency’s inspection and instruction methods and in examinations for all types of pilot certificates. The Center provided mandatory refresher courses for all flight and inspecting personnel, as well as required classes for new employees before they went to their regular post of duty.