波音公司在得到澳大利亚快达航空公司的６架飞机的确认订货后于２０００年１１月２８日宣布正式启动远程型波音７４７—４００（以前称作波音７４７－４００Ｘ），并于２００２年投入使用。远程型波音７４７—４００飞机的最大起飞重量为４１２．８吨，增加了１５．８吨、航程 Boeing announced the official launch of the long-range Boeing 747-400 (formerly known as the Boeing 747-400X) on November 28, 2000, after confirming the order of six aircraft from Qantas Airways Australia and was put into operation in 2002. The maximum take-off weight for the long-haul Boeing 747-400 was 412.8 tonnes, an increase of 15.8 tonnes and range