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
Parks College Airline Air Lines". Ozark Air Lines had recently lost its operating certificate from the CAB and purchased the Parks airline only days into its new service to gain its certificate and routes. Ozark would eventually merge with Trans World Airlines in 1986, which in turn would merge with American Airlines in 2001. Mid-Continent would later become part of Braniff International Airways which ceased operations in 1982. The Parks College Airline fleet consisted of the following aircraft as of 1950: Parks College Airlines operated over 17 years without incident. Parks College Airline Parks College Airline was an defunct airline based in the