The helicopter being used to search for Solo (N73959 1963 Bell 47G-3B-1 s/n 2830) was at the same time the very same one Dr. Kingsley/Thrush were using for the white robed man to pick up Solo as he approached the compound.
The plane Solo was flying was a twin engine model, but the footage shows the burning wreckage of a single-engine plane hitting the ground. The terrain is also different from that flown over by Ilya in the helicopter.
Illya and Solo emerge from the car wreckage with gashes over their eyes. The wounds are gone by the next scene.
As the unconscious Erikson descends down the elevator his arms extend over his head and shoulders. When he reaches the bottom his arms are now by his side.
Although the plane carrying Solo was shown crashing into water, the burning wreckage behind Solo where he landed in his parachute is dry land.