I find the proposed fine laughable.
If the repercussions of cutting corners and/or deliberately failing to meet design standards are met with such weak consequences, the motivation to do better will be severely lacking. As has been proved time and again, management of large corporations react to one thing, and one thing only: Money.
Therefore the conversation should have gone as follows:
FAA: Hi Boeing, tell us how much profit you're making on each aeroplane. Open your books fully to our auditors.
Boeing: Eh, that's a trade secret, no can do
FAA: Your choice, the TC for the affected aircraft type is herewith withdrawn until such time you present the numbers
2 second later
Boeing: Hi FAA, here are the numbers. It's x,x million per aircraft
FAA: Thank you, and how many with non-conforming parts did you deliver despite knowing of the non-conformity?
Boeing: Eh, we don't know, can't say for sure, it's highly complex, yada yada yada
FAA: Your choice, the TC remains suspended
1 second later
Boeing: 83 is being the number
FAA: Excellent. The fine is 2 times X,X millions times the number of aircraft delivered. TC will be reinstated when you've paid
Boeing: We'll appeal and sue!
FAA: That's your choice, the TC remains suspended
Boeing: Where would you like us to transfer the funds too?
FAA: Our usual account, thanks. Now, for the other part
Boeing: The other part, but, but, but how about the TC
FAA: In a minute. Now give us the names of every single employee involved in the decision process leading up to you delivering non-conforming aircraft
Boeing: All of them?
FAA: Indeed, and your org. chart as it was when this went down
Boeing: Org chart?
FAA: Of course, we need to get to the top of this. Someone's going to have a day in court, we'd like to know who it was
FAA: Quite right, you fracked it up good and well and that comes with consequences. Names, please
Boeing: Here's the file
FAA: Thank you very much, the TC has been reinstated, see you in a criminal court of law
Signature. You just read one.