General Electric Aviation has been forced to delay first flight of the GE9X engine for Boeing’s 777X flagship program after the late discovery of a minor design issue with the new turbofan as well as maintenance-related problems with the CF6 engines powering the company’s 747-400 flying testbed. However, GE Aviation says the slip does not jeopardize the schedule for the overall engine certification program or the first flight of the 777X, which is targeted for around February ...


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