747-400

Boeing 747-400

The Boeing 747-400 is a major development and the best-selling model of the Boeing 747 family of jet airliners. While retaining the four-engine wide-body layout of its predecessors, the 747-400 embodies numerous technological and structural changes to produce a more efficient airframe. Its most distinguishing features versus preceding 747 models are 6-foot (1.8 m) winglets mounted on 6-foot (1.8 m) wing tip extensions, which are found on all 747-400s except for Japanese domestic market versions.

The 747-400 is equipped with a two-crew glass cockpit, which dispenses with the need for a flight engineer, along with more fuel-efficient engines, a horizontal stabilizer fuel tank, and revised fuselage/wing fairings. The aircraft also features an all-new interior with upgraded in-flight entertainment architecture. As on the 747-300, passenger variants include a stretched upper deck as standard. The model has a maximum capacity of 379 passengers with the 747-400D variant,[5] and can fly non-stop for up to 7,670 nautical miles (14,200 km) with maximum payload, depending on model.

Northwest Airlines first placed the 747-400 in commercial service in February 9, 1989. The 747-400 was produced in passenger (−400), freighter (−400F), combi (−400C), domestic (−400D), extended range passenger (−400ER) and extended range freighter (−400ERF) versions. The 747-400 is the second-most recent version of the Boeing 747 aircraft family, to be superseded by the more economical and advanced Boeing 747-8. The last −400 model was delivered in December 2009.[6]



Boeing 747-400

Boeing 747-400 of British Airways, the type's largest operator Role	Wide-body jet airliner National origin	United States Manufacturer	Boeing Commercial Airplanes First flight	April 29, 1988 Introduction	February 9, 1989 with Northwest Airlines Status	In service Primary users	British Airways China Airlines Cathay Pacific United Airlines Produced	Passenger versions: 1988–2007[1] Freighter versions: 1993–2009[2] Number built	694[3] Unit cost	747-400/-400ER: US$234–266.5 million[4] 747-400F/-400ERF: US$238–268 million[4] Developed from	Boeing 747-300 Variants	Boeing YAL-1 Boeing 747 Large Cargo Freighter Developed into	Boeing 747-8