True.LEAP-1C Engines continue to serve C919 for foreseeable future. its a done deal.. unless America completely cut off Engine supply and force COMAC to switch to domestic option. very very less chances
as per the latest AECC statement, '' it is not possible to replace all LEAP engines with CJ-1000A. this is just an alternative option in order to secure supply line. CJ-1000A exceed all the parameters during evaluation and testing. and soon Engine will be mounted on C919 wings for final test ''.
But once CJ1000A is certified, put into mass production, it only need to prove its reliable. It will be the LEAP engines that will be the alternative as Chinese Airlines flying C919 at home don't required any foreign made engines.