I could imagine that the biggest risk for Boeings exec comes from the certification issues. That they lost two planes because of the system will result in civil law suits and, I'd guess, a settlement. If Boeing can get these settlements without admitting to wrong doing they will have an advantage on the certification front. If they have to admit wrong doing to get a settlement, like VW had to, the Execs are in much more trouble. And the bad thing for them is that the FAA certification process and any potential cheating in it can be litigated and prosecuted in the US.

Boeing itself should be fine after a couple of really expensive years. VW was as well and I for my part really thought VW could go under. Instead it hit some high level managers and around 30 billion in fines.