Boeing rolled out the initial 737 MAX 9, N7379E (c 42987), at Renton on March 7. This is the largest MAX variant to be developed to date. Its first flight was due to take place a few weeks later, after the completion of ground tests and engine runs. The first delivery is due in 2018 following certification testing. This isn't the only recent milestone in the MAX programme. Two days after the MAX 9's roll-out the 737 MAX 8 received US Federal Aviation Administration Type Certification. Separately, Boeing confirmed during the ISTAT Americas conference in San Diego that it is working a proposed new addition to the family, the 737 MAX 10X. A Boeing statement to AIR International said: "Boeing is studying a new stretched variant. It would offer customers increased capacity [and] the lowest seat costs ever for a single-aisle aircraft. Boeing is actively engaged in discussions with customers about the 737 MAX 10X and has extended business offers in some cases."
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机译：波音公司于3月7日在伦顿（Renton）推出了首架737 MAX 9，N7379E（c / n 42987）。这是迄今为止最大的MAX变型。它的首次飞行定于几周后，即完成地面测试和发动机运行之后。首次交付应于2018年通过认证测试。这不是MAX计划中的唯一近期里程碑。 MAX 9推出两天后，737 MAX 8获得了美国联邦航空管理局的型式认证。另外，波音公司在圣地亚哥的ISTAT美洲会议上确认，它正在为波音737 MAX 10X系列飞机提出新的提议。波音公司在AIR International的一份声明中说：“波音公司正在研究一种新的加长型飞机。它将为客户提供更大的容量（并且）有史以来单通道飞机的最低座位成本。波音公司正在积极与客户就737 MAX进行讨论。 10倍，并在某些情况下扩展了业务报价。”
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