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The Boeing 747-400 is a large, long-range wide-body airliner produced by Boeing Commercial Airplanes, an advanced variant of the initial Boeing 747.The "Advanced Series 300" was announced at the September 1984 Farnborough Airshow, targeting a 10% cost reduction with more efficient engines and 1,000 nautical miles [nmi] (1,900 km; 1,200 mi) of additional range.
Nose section Center section Example 717, 727, 737: 6 wheels [1x2]+[2x2] A Boeing 737 from Southwest Airlines: 747: 18 wheels [1x2]+[4x4] A Boeing 747-400's main landing gear. Note the toes-up bias angle of the bogies on the wing gear, to ensure correct stowage upon retraction: 707, 720, 757, 767, 787: 10 wheels [1x2]+[2x4]
A total of 694 of the 747-400 series aircraft were delivered. [135] At various times, the largest 747-400 operator has included Singapore Airlines, [193] Japan Airlines, [193] and British Airways. [194] [195] As of July 2019, 331 Boeing 747-400s were in service; [168] there were only 10 Boeing 747-400s in passenger service as of September 2021.
Flight recorder (orange) in the aft equipment center of Boeing 747. Avionics bay, also known as E&E bay or electronic equipment bay in aerospace engineering is known as compartment in an aircraft that houses the avionics and other electronic equipment, such as flight control computers, navigation systems, communication systems, and other electronic equipment essential for the operation.
The "City of Everett", is a Boeing 747, registered as N7470, that was built by Boeing as the prototype of the type.The aircraft rolled off the assembly line on September 30, 1968, and had its first flight on February 9, 1969.
The landing gear represents 2.5 to 5% of the maximum takeoff weight (MTOW) and 1.5 to 1.75% of the aircraft cost, but 20% of the airframe direct maintenance cost. A suitably-designed wheel can support 30 t (66,000 lb), tolerate a ground speed of 300 km/h and roll a distance of 500,000 km (310,000 mi) ; it has a 20,000 hours time between overhaul and a 60,000 hours or 20 year life time.
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The Boeing Everett Factory, officially the Everett Production Facility, is an airplane assembly facility operated by Boeing in Everett, Washington, United States.It sits on the north side of Paine Field and includes the largest building in the world by volume at over 472 million cubic feet (13,400,000 m 3), which covers 98.3 acres (39.8 ha).