I mean, without American replacement parts I don’t know how flyable they are. Stiffing the US on something is an option for next play, though.

Edit: So, correction. Interestingly it looks like the US is actually dependent on others for parts itself, and Japan has a good helping of all the parts in the whole plane being built domestically, so maybe not all is lost there. (This link looks legit, but disclaimer that I’m unfamiliar with it and you can’t always tell at a glance post-AI)

That being said, the software is definitely closed-source, and all their design.