FS2002 ProjectAI CWC Challenge Air Cargo 1988 Boeing B703. A direct descendant from America's first ever jet transport (Model 367-80 nicknamed 'Dash 80'), the Model 707-100 made its maiden flight on 20th December 1957 and was the first US jet transport to enter service. In its day it was to become the worlds most successful jetliner fighting off competition from Douglas and Consolidated Vultee and also established Boeing as a major player in the new age of transport. The next development was the stretched B707 naturally enough called the -300. This also featured JT4A's and first flew in January 1959. This was soon to be supplanted by the -300B which used JT3D turbofans with redesigned wings (curved tips plus increased span and area), flaps and bigger fuel tanks which allowed the 707 to carry 141 passengers over a range in excess of 4000 miles making it truly intercontinental.