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he 747-400 is the latest, longest ranging and best selling model of the 747 family and also the only series still in production. It added 6ft(2m) wing tip extensions and 6ft(2m) winglets, an all-new glass cockpit which dispensed with the need for a flight engineer, tail fuel tanks, revised engines, an all-new interior, and newer in-flight entertainment to the basic design of the -300 series.
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