http://www.museumofflight.org/aircraft/boeing-727-022"One of the world's classic airliners, the Boeing 727 was developed to provide economic low-altitude, high-speed cruising capability. From the time it was first flown, in February of 1963, until production ended in 1984, a total of 1,832 had rolled off factory lines and had seen service with more than 100 different airlines.
The Museum's airplane was the first 727 ever produced. Following the conclusion of Boeing's flight-test program, it entered regular passenger service with United Airlines.
It is currently undergoing restoration at the Museum's Restoration Center in Everett, Washington.Which it appears to have been doing since at least 2004 -
http://rbogash.com/727adopt.html :-?
So where exactly is it?