Aviation officials say the wheel is part of equipment used to haul the chopper around the landing pad during maintenance.
Officials say it should've been removed before the aircraft took off.
The mechanic and his wife came home and found pictures knocked to the floor and cracks in a hallway's drywall.
He crawled into the attic and saw a hole about the size of a loaf of bread in his roof, with a tire peeking through.
