Under the Sustainable Flight Demonstrator project, Boeing will work with NASA to build, test, and fly the full-scale X-66 demonstrator aircraft. The project seeks to inform a new generation of more sustainable single-aisle aircraft – the workhorse of passenger airlines around the world. Boeing transported the MD-90 aircraft that will be turned into the X-66 to its Palmdale, California facility last year, and has removed its engines as the modifications started.

The X-66 is a key part of NASA’s Sustainable Flight National Partnership, through which the agency seeks to protect the environment, grow the U.S. economy, and provide new innovations for the traveling public.