Sabena airliners which were augmented and later replaced by Douglas DC-6Bs. The DC-4s also restarted the airline's traditional route to the Belgian Congo. Sabena was the first airline to introduce transatlantic schedules from the north of England, when one of its DC-6Bs inaugurated the Brussels-Manchester-New York route on 28 October 1953. The Convair 240 was introduced in 1949 to partially replace the DC-3s that until then had flown most European services. As of 1956, improved Convair 440 "Metropolitan" twins began replacing the Convair 240 twins and were used successfully well into the 1960s between European regional destinations. In 1957, the long-range
Sierra National Airlines They won a court case against the airline but the government stopped the process. As of January 2005 Sierra National Airlines operated the following services: Sierra National Airlines Sierra National Airlines was the national airline of Sierra Leone. It was based at the Lungi International Airport, in Lungi, Sierra Leone. It operated scheduled domestic, regional and international services. Sierra Leone Airways was founded as Sierra Leone's national carrier in 1958 when the government withdrew from the regional West African Airways Corporation partnership with Nigeria, Ghana, and the Gambia. In 1982, the Sierra Leone government entered into a partnership with Alia/Royal