Another outstanding post, Sir.
Perhaps the way forward, is to contact the relatives of victims and encourage their legal representatives to sue the individuals who currently ignore your proper, scientific analysis.
They
know their product leaves something to be desired in manufacturing and QC. The customer, the Helicopter manufacturer, also must now know, from the top of management downwards, that their product does not, in many cases, have the service -life claimed for it.
They can bluster all they like, that "development" or "inspection" failed to notify them......but a couple pf cases holding them
personally responsible for wilful neglect of customer safety, misrepresentation and wilful complicity in homicide.....well! that may sharpen up their thinking and morals!
If these marginal products were destined for machines in the "experimental " category and the buyers knew the risk, that would be a fair and reasonable transaction
That is not the case. The Manufacturers are selling a Certified product at an enormous price and the buyer has every right to expect that the Certification by the regulatory authorities is fit for purpose.
It's not, they are endorsing sub-standard products that are killing people.