> Changing a part, without also changing it's part-number, doesn't sound like a normal thing to do (and then forget about).
This really depends. If the original part was not being made to spec and the "new" part was to spec, the specs never changed and therefore the part number shouldn't change. They would just identify that parts with serial numbers or stamp dates up to X were not made to spec or defective.
This really depends. If the original part was not being made to spec and the "new" part was to spec, the specs never changed and therefore the part number shouldn't change. They would just identify that parts with serial numbers or stamp dates up to X were not made to spec or defective.