The part will be found and depending upon what it was....and the damage to it....and the location it is found and other forensic evidence to include the wire......will determine the sequence or events....assuming an effective Accident Investigation is conducted.
Let's be honest....Wires will straight up kill you.....and if there is wire down....the odds of it being something departed the aircraft THEN the aircraft hit the wire cutting it....are rather small.
Hitting the wire and something departing the aircraft AFTER the wire strike are far. more likely.