North Central Airlines Enters the Jet Age with a "New Look"! According to this informational leaflet "North Central Airlines began a 31-aircraft program to convert its Convair 440's to Allison prop-jets in August 1966. Douglas DC-9 fan jets will complete North Central's "New Look." Conbined with the Convair 580's, the 100-passenger jets will give the airline an all jet-powered fleet in 1968." Please Click On Image For A Closer Look! This item is for display only and not available for sale.