To add, apparently the whole 'bogus parts' thing comes from one bolt (?) that had it's identifying number partly worn off after installation, and the engineer who fitted it had not noted the part number prior to fitment (an error, definitely). The part number was subsequently found on inspection under florescent light, as per Boeings instructions apparently. The CAA introduced the 'pirate/bogus part' term thereafter. Again, I hope the facts I have are correct.