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ALL AIRCRAFT DEVELOPMENT programs are difficult to complete, expe-riencing setbacks and design flaws and missing certification deadlines. Entry into service and the transition into low-rate production also present challenges. The Commercial Aircraft Corp. of China's (Comac) C919 narrowbody development program is no exception.Comac announced the C919 program and started developing the first prototype in 2011. In late 2015, the first aircraft was completed, and by mid-2017 the second was built. Comae has built six flight-test aircraft ahead of the low-rate production phase-the start of which might be announced this year around the Zhuhai Airshow. The company lists 815 orders and intends to produce and deliver 150 aircraft per year. As a point of comparison, it took veteran aircraft-maker Boeing, with many times the experience of Comae, nine years from entry into service of its 787 widebody to reach full-rate annual production of 158 787s in 2019.
机译:所有飞机开发计划都难以完成,分配挫折和设计缺陷以及缺少认证截止日期。 进入服务和过渡到低利率产量也存在挑战。 中国的商业飞机公司C919窄体发展计划没有Exceply.comac宣布C919计划并开始在2011年开始开发第一个原型。2015年底,第一架飞机完成,并于2017年中期,第二架是2017年中期 建造。 Comae在低利率生产阶段建立了六个飞行试验飞机 - 从今年在珠海航空航天期间开始宣布。 该公司列出了815个订单,并打算每年生产和交付150架飞机。 作为一个比较,它需要老将飞机制造商波音,康马雷多次经验,九年从其787个宽体的服务达到2019年的全额年产量为158 787年代。

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