First, the company is redesigning certain portions of the airplane that are difficult to build, bringing those elements in line with modern manufacturing techniques. The balance there, however, is ensuring that those design changes are significant enough to improve ease of assembly while not triggering the need for the Air Force to perform additional flight testing, Sears said.
One example is the F-15’s center fuselage, which is broken into five main sections. The company is redesigning one of those segments — the most complex part of the structure because of how the plane’s landing gear is affixed to it, he said.