Delivered to American Airlines in 1970 as N9668. It was then acquired by NASA in 1974 as N905NA. This aircraft is the 86th Boeing 747 ever produced. It's 42 years old. After carrying Space Shuttle Endeavor to California, this aircraft will head to Mojave and get parted out for NASA's 747SP SOFIA. This is the last takeoff for this SCA (Shuttle Carrier Aircraft)