Airbus A300
In 1966, Frank Kolk, a member of American Airlines, asked for a plane to replace the Boeing 727. He wanted a plane which could hold 250 to 300 passengers, with two engines. American plane makers made planes with three engines, like the McDonnell Douglas DC-10 and the Lockheed L-1011 Tristar, because the FAA had banned planes with two engines from flying on certain routes.