Near the end of the movie when the airplane with Neal and Lia is crashing, the first shot of it sliding down the mountain clearly shows the tail broken off, and we also see someone outside/above the cockpit waving their arms, but in the following shots the plane is shown with the fuselage still intact (minus wings only) sliding down the mountain and the cockpit is also still intact with both people inside and in their seats. This is also the way the plane ends up in the crevice.