As usual someone says that you "only" have to go back to the last C of A but this won't wash if the last guy made a mistake.
I am sorry but that does not wash either. It is the last guys responsibility not the new guys. The words from the CAA are that the engineers go back to the last CofA and nothing more. Routine check on lifed items.
If you believed every engineer they will tell you that they always do a better job than the last guy!!!!