Personal thoughts are make a big ditch and bury the whole helicopter, as I would trust nothing off that airframe. Make it an insurance claim. I had a lightning strike near my house many years back, some 20 metres away. It blew half of the electrical items plugged into the walls and yet everything else was fine. The telephone along with its surge protector sounded like a childs rattle when shaken. Maybe burying the helicopter is not definite enough, burn it and then cut up the big steel bits left after the fire.