Development of the 747-400, which had a range of 8,350 miles -- longer than the range of the 300 -- began in 1985.
Boeing rolled out the first 747-400 on Jan. 26, 1988, the same day as the first 737-400. The first flight was operated by Northwest on Feb. 9, 1989. The new plane had a glass cockpit, which enabled a reduction in the size of the cockpit crew to two pilots rather than three. It also incorporated major aerodynamic improvements, including winglets to reduce drag, new avionics, a new flight deck and updated entertainment systems. It typically accommodated about 415 passengers in three classes or 524 passengers in two classes.