Gulfstream G800 jetU.S. President Donald Trump threatened to decertify Bombardier Global Express business jets and potentially all aircraft manufactured in Canada unless Canadian authorities certify U.S.-made Gulfstream models. In a post on Truth Social on Thursday, Trump accused Canada of blocking Gulfstream aircraft through its certification process and warned of trade retaliation. FlightRadar24 said more than 400 Canadian-made aircraft were operating to and from U.S. airports as of around 0100 GMT on Friday. Cirium Aviation Analytics said 150 Global Express aircraft are registered in the U.S. and operated by 115 operators. Transport Canada, which oversees aircraft certification in Canada, has not commented on the issue.