Updated from Tuesday, July 7CHARLOTTE, N.C. -- Now that it has agreed to buy a South Carolina plant that fabricates major parts for the 787, Boeing ( BA) could be on a path to establish a new 787 assembly line in that state as well. Boeing said Tuesday it will pay $580 million for the Vought Aircraft Industries plant in North Charleson, where Vought fabricates and assembles the rear fuselage sections for the long-delayed aircraft. Boeing will also release Vought from repaying unspecified advances. Many view the deal as the first step on the path to Boeing's creation of a second line in North Charleston, complementing the current line in Everett, Wash. It's no secret that Boeing has had some labor issues in its current location. At the Paris Air Show last month, CEO Jim McNerney said Boeing was "actively looking" to establish a second line, according to Aviation Week.