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The Boeing 737 MAX is a family of aircraft being developed by Boeing Commercial Airplanes. The new family is based on the Boeing 737 Next Generation family, which it is to replace. It will be the fourth generation of the 737 family. The primary change is the use of the larger and more efficient CFM International LEAP-1B engines. The airframe is to receive some modifications as well. The 737 MAX is scheduled for first delivery in 2017, 50 years after the 737 first flew. Boeing has firm orders for the 737 MAX totaling 2,869 as of September 2015. ==Development== Since 2006, Boeing has discussed replacing the 737 with a "clean-sheet" design (internally named "Boeing Y1") that could follow the Boeing 787 Dreamliner.〔("Boeing firms up 737 replacement studies by appointing team." ) ''Flight International'', March 3, 2006. Retrieved April 13, 2008.〕 A decision on this replacement was postponed, and delayed into 2011.〔Hamilton, Scott. ("737 decision may slip to 2011: Credit Suisse." ) ''Flightglobal,'' 2010. Retrieved June 26, 2010.〕 In November 2014, it was reported that Boeing intends to replace the 737 by 2030 with a new airplane, possibly with a composite airframe. In 2010, Airbus launched the Airbus A320neo with new engines to improve fuel burn and operating efficiency; it was initially planned to enter service by mid-2016, later moved up to October 2015.〔(A320neo entry advances to 2015 with PW as lead engine ) Flightglobal〕 The decision was met with positive reaction by many airlines, which began making major orders for the improved aircraft. Pressure from the airlines for more fuel efficient aircraft caused Boeing to pursue upgrading the 737 with new engines instead of the new Boeing Y1 design.〔O'Keeffe, Niall. ("Caution welcomed: Boeing's 737 Max" ). ''Flight International'', September 12, 2011.〕 On August 30, 2011, the company's board of directors approved the 737 MAX project. Boeing predicted that the 737 MAX will provide a 16% lower fuel burn than the current Airbus A320, and 4% lower than the Airbus A320neo. Boeing expects the 737 MAX to meet or exceed the range of the Airbus A320neo. The first 737 MAX aircraft is scheduled to be delivered in 2017.〔 There are three main variants of the new family, the 737 MAX 7, 737 MAX 8 and 737 MAX 9 which are based on the 737-700, -800 and -900ER, respectively, the best-selling versions of the 737 Next Generation family.〔 Boeing has stated that the fuselage lengths and door configurations from the Boeing 737 Next Generation family will be retained on the first three 737 MAX variants. On July 23, 2013, Boeing announced it completed the firm configuration for the 737 MAX 8.〔("Boeing Completes 737 MAX 8 Firm Configuration" ). Boeing, July 23, 2013.〕 In December 2013, Boeing stated that a recent internal audit forecasts a 14% lower fuel burn than current 737NG series aircraft.〔Norris, Guy. "MAXimizing performance". Aviation Week and Space Technology, December 2, 2013, pp. 36-37.〕 In September 2014, Boeing launched a high density version of the 737 MAX 8, named the 737 MAX 200. The MAX 200 is named for its seating for up to 200 passengers in a single-class high-density configuration with slimline seats. An extra exit door is required because of the higher passenger capacity. Three of eight galley trolleys〔(【引用サイトリンク】title=UPDATE 5-Ryanair buys 100 Boeing 737 MAX jets, sees fare price war )〕 are removed to accommodate more passenger space. Boeing states that this version will be 20% more cost efficient per seat than current 737 models, and will be the most efficient narrow body on the market when delivered, including 5% lower operating costs than the 737 MAX 8. Boeing has increased 737 production to 42 per month in 2014, and plans to increase rates to 47 per month in 2017 and 52 per month in 2018.〔("Boeing to Increase 737 Production Rate to 52 per Month in 2018." ) ''Boeing.'', October 2, 2014. Retrieved November 10, 2014.〕〔("737 derailment probe 'suggests' track alignment issue." ) ''Flightglobal.com'', November 5, 2014.〕 The first 737 MAX fuselage completed assembly at Spirit Aerosystems in Wichita, Kansas on August 13, 2015. It will be for a test 737 MAX and eventually delivered to launch customer Southwest Airlines. Spirit Aerosystems manufactures the 737 MAX's thrust reversers. A shortage of a critical component for the thrust reverser has developed; supplier GKN PLC has had difficulty producing the titanium honeycomb inner wall. While early test components met Boeing's specifications, GKN is unable to ramp up production, threatening Boeing's goal of producing up to 52 MAX versions per month by 2020.〔Ostrower, Jon. "Boeing scrambles to get key part", Wall Street Journal, August 21, 2015, pp. B1, B5.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Boeing 737 MAX」の詳細全文を読む スポンサード リンク
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