Use the defective aircraft for target practice, then force Boeing to replace them, free of charge, or lose all existing and future contracts with the US government. Make the defective parts cost Boeing far more than replacing them would have cost and they'll never do it again.
I don't suppose waiting for the truth to come out has any part in your elaborate plan?
Just because three disgruntled employees say something does not make it true. If the parts were so bad that they didn't pass the FAA certifications, a quiet word to the FAA inspectors would have solved the entire matter.
There is more here than meets the eye. For instance, nowhere is the nature of the defect even hinted at. We there holes in fuel tanks? Or was it simply an "i" not dotted or a "t" not crossed on some FAA form?
As a plane owner, I can tell you that a certificated airworthy part does not mean it's good or bad, just made IAW paperwork rules.
You could make cement life preservers and have them certificated as made IAW all requirements called for. They will still drown the user. Just to a specification drowning.
I've got enough airorthiness directives from the FAA on one part, requiring this or that to comply with the directive. As new airworthy specialists come on line at the FAA, they issue new directives, countering the ones from previous airworthiness specialists. I've had several unairworthy parts made even more unairworthy after the FAA gets thru detailing the required fix. All seven or eight times!
I haven't peeked at your profile yet but I'll make a guess. You've never worked for the government nor a government contractor.
That is a unique and wonderful solution to the problem. I'm for it.