GQfluffy From , joined Dec 1969, posts, RR:
Reply 1, posted (10 years 3 weeks 6 days 15 hours ago) and read 1356 times:
Most likely test flights of some sort. Odd that a 737-900 would be at Everett. Could be that the 744 went to Vancouver to tanker then continued on it's delivery flight. With Boeing, especially with 4 major airports it utilizes in that area...who knows?