Full FAA Chronology at this link.
19470615: President Harry S Truman appointed a Special Board of Inquiry on Air Safety, headed by CAB Chairman James M. Landis. The action followed a series of three DC-4 airline accidents that claimed the unpredecented total of 145 lives between May 29 and June 13, 1947. On August 15, Landis suggested that the Civil Aeronautics Board immediately hold hearings on airline crew complement to determine whether a flight engineer was required on all four-engine air transports in scheduled domestic passenger service. Between October 6-8, CAB held such hearings, and as a result, in April, 1948, adopted the so-called 80,000- pound rule. Effective December 2, 1948, (subsequently extended to March 31, 1949), all airplanes certificated for a maximum takeoff weight of more than 80,000 pounds were required to carry an airman holding a flight engineer’s certificate. Airmen with a pilot’s or a mechanic’s background could qualify for the certificate.
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This Day in FAA History: June 15th
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