Although Boeing and Airbus are being coy about when the respective 737 and A320 replacements will come to market, the airframers and potential aircraft makers are quietly stepping up efforts to birth the new programs. On the engine side, CFM International, around mid-year, plans to run the core for the LeapX engine, the powerplant being devices as a potential follow-on for the CFM56 – the General Electric/Snecma joint venture also is doing work on open-rotor designs. Additionally, CFMI ...


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