@averow
We know with 100% certainty that no T7 ever lost a flaperon in-flight. What we no not know is how many flaperons were damaged, replaced and scrapped in the world-wide fleet, and whether there any chance that any of those scrapped may have ended up somehow in the IO.
Agreed, the above scenario is extremely unlikely, and all balance of probabilities point to it being a part of MH370. However for a judicial investigation that is not sufficient. I'm sure the investigators are busy requesting the records of all affected T7 operators to try to eliminate all possible unaccounted flaperons from the equation.