Initially preserved in its original USAF markings as 72-1875 at Pima since 1981, but restored to flying condition for use as a testbed in 1996. Registered as N15YC to the United States Government (c/o McDonnell Douglas Corp) on 1 Apr 1977, and first flown for the C-17 development program on 11 Apr 1997. Last flight 11 Jul 1998, and stored at Palmdale. Moved to Edwards AFB in 2008 and now preserved at (the publicly accessible) Century Circle adjacent to the West Gate at Edwards.