crHedBngr
Having worked in aerospace and defense/defence manufacturing for over 18 years, I can certainly see how things can be difficult to track down and verify. Data mining in these industries is always a "joy". We'll see how all pans out in the long run.
I worked in the UK defence electronics sector as a design engineer for many years in the '70s and the documentation was excellent. After one failure in service it was my job to find out what happened to the fully-encapsulated module that had failed and try to get the data out. QA gave me the history card and provided documentation for all components used. I found that a batch of components supplied had been incorrectly marked by the manufacturer. Maybe standards are lower today?