What I think is more likely to happen (but still unlikely) is that Boeing is penalized through corporate liability. The aggregation of the executives' actions create a responsibility for Boeing, although no single person's actions meet any criminal action. In that case the USA would fine Boeing or punish it in some other way, but I don't think that money is going to Ethiopia or Indonesia.
Lastly, since we don't have extradition agreements with either of those countries these arguments would probably not even come up, as we'd tell their embassy to go pound sand- we're not handing over American citizens until you reciprocate with us, prove that your courts are not kangaroo courts, and sign an extradition agreement. And there's no way we're signing one- you think the Trump administration is going to sign an extradition agreement with either of those countries? No, these guys are going to skate.
Some references, they probably don't hit everything but they are a good start:
https://www.justice.gov/jm/criminal-resource-manual-612-role...
https://www.justice.gov/jm/criminal-resource-manual-603-dete...
https://criminal.findlaw.com/criminal-procedure/extradition....
That's quite the hypothetical, and I don't advocate it. But they certainly don't have to be limited by extradition.
This is not something the board can do
Morally, ethically, legally questionable. But certainly not impossible.
I'm sure they'd just fire the executive(s) in question first. Lots cleaner and maybe cheaper depending on the golden parachute in the executive's back pocket.