THE COMMERCIAL Aircraft Corporation of China (COMAC) has taken another major step forward in the development of its twin-engine narrowbody airliner, the C919. On August 1, the state-owned aerospace manufacturer's fourth prototype, B-001E (c 004) successfully completed its maiden flight, departing Shanghai/Pudong International Airport at 0530 and returning 1hr and 25mins later. As part of the sortie, the aircraft's flight envelope was quickly expanded and its basic systems tested. As the fourth aircraft to enter the flight development and certification programme, it will be used to fully test the type's advanced avionics system, take-off and landing performance, automatic flight system and determine how it handles in natural icing conditions.
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机译：中国商用飞机公司（COMAC）在开发双引擎窄体客机C919方面又迈出了重要的一步。 8月1日，这家国有航空制造商的第四架原型机B-001E（c / n 004）成功完成了首飞，于0530从上海/浦东国际机场起飞，并在1小时25分钟后返回。作为出击的一部分，飞机的飞行范围迅速扩大，并对其基本系统进行了测试。作为进入飞行发展和认证计划的第四架飞机，它将用于全面测试该机型的先进航空电子系统，起降性能，自动飞行系统，并确定其在自然结冰条件下的处理方式。
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