Sabena served by the airline. Sabena used landplanes for its Congo operations and a program of aerodrome construction was initiated in the Congo. This was finished in 1926 and Sabena immediately began flights within the Belgian colony, the main route being Boma-Léopoldville-Élisabethville, a 2,288 km (1,422 mi) route over dense jungle. First, flights were operated with De Havilland DH.50s, although these were quickly replaced by the larger Handley Page W.8f which had three engines and offered ten seats. By 1931 Sabena's fleet, including the aircraft used on the Congo network, totalled 43 aircraft. Its mainstay type was the Fokker F.VIIB with
National Airlines (1934–1980) Maytag, Jr. (grandson of Maytag Corporation founder Frederick Louis Maytag I), who had previously led Frontier Airlines bought a majority share in National Airlines and replaced George T. Baker as CEO. In 1960, the airline modernized its fleet with new Douglas DC-8 jetliners which were then followed by ten new Boeing 727-100 trijets, the first of which was delivered in 1964. After the retirement of the Electras in 1968, National became an all-jet airline with the DC-8 and 727. The airline introduced the first jet service into Key West, FL in 1968 with the Boeing 727-100. The Douglas DC-8 fleet