Boeing 747-400
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| 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 Lufthansa China Airlines 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 |
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 660 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 The 747-400 is the second-most recent version of the Boeing 747 aircraft family, to be superseded by the more economical and advanced Boeing 747-8.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]
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