"mis-aligned area of counter-boring"
Am I the only one that finds this manufacturing error astonishing? At the end of my career I spent many years in an aerospace manufacturing company. Every single component that was manufactured in our shop had an extensive QA inspection and test before shipping. This involved, among other things, detailed visual inspection, NDT crack detection (dye penetrant or magnetic particle) and computer controlled coordinate measurement of all of the component's key dimensions. There is absolutely no excuse for an error of this magnitude. Whoever made that oil pipe has had a massive QA failure in their factory.