Full FAA Chronology at this link.
19530427: Frederick B. Lee was sworn in as CAA Administrator. He succeeded Charles F. Horne (see May 18, 1951), who resigned on March 6, 1953, because of the change in administration following President Eisenhower’s election. Lee received his A.B. degree from Stanford in 1928 and a law degree from Harvard in 1931. A naval aviator in World War II, he rose to the rank of commander, authored a manual for naval flight instructors, and supervised training in night fighters and torpedo units. He joined CAA in 1946 as Program Planning Officer, was made executive assistant to the Administrator in January 1947, and became Deputy Administrator the same year. He was still Deputy Administrator when nominated on March 11, 1953, to be Administrator. (See December 8, 1955.)
19590427: FAA announced a contract award for development of an air height surveillance radar (AHSR-1) to automatically provide air traffic controllers with information on aircraft altitudes up to a range of 50 nautical miles.