I found an MI-17 up in Devils castle and i began repairing it. I repaired the hull with scrap metal, it disappeared on the left action menu. I then jumped into the helicopter and the hull on the top left was still red. I jumped out and made sure that i repaired the hull and not the rear rotor. the hull was not on the left side action menu to be repaired. I dont know what is going on and I don't want to use any more parts to see if it works. any ideas?