Sunfish,
I know a 4 seater aircraft that had a wing replacement (with a second-hand wing) that wasn't properly documented and was only found out after the previous 9 or 10 maintenance organisations plus with a paid independent pre-purchase inspection had missed the omission entirely.
The only supplier of such wings made a declaration that they had never shipped out any spare second hand wings with more than 3500 hours on them, so that was taken as the base value at wing replacement and carried forward.
I think this took quite a few months of negotiation with CASA but at least had a happy ending. But it was only one component.