Stuff that falls off is rarely identified as belonging to a specific aircraft as nobody wants to open themselves up to damage claims.
The loss of the part itself becomes part of a record to the regulator but not the exact trajectory.
I've seen stuff weighing 500 pounds or more recovered but not linked to a specific aircraft. On the other hand I've seen stuff that was identified not being released by the finder except for a whole lot of money. Of course that doesn't stop investigators from examining it in situ
