preliminary design stage has completed. detailed design phase begun last year..
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in comparison with C919-
C919 preliminary design stage completed in 2011 , detailed design phase is in 2012, On 2 November 2015, COMAC rolled out its first C919 aircraft. first high speed taxi run completed in April, 2017..
so if everything goes well, then first flight will take take place in 2029-2030.. and if C929 first flight delays further then most probably C929 will take first flight with CJ-2000 engines.
