Helicopters within the game always explode when tipping over.
There is almost no possibility of landing during an emergency auto-rotation flight operation due to the physics always exploding the chopper during every tip-over. Tipping over is likely always going to occur with the current model because the model is extremely sensitive to just tipping over upon any normal landing.
The only possibly safe helicopter landing during an auto-rotation maneuver is over and in water! (I have not had a chance to auto-rotate over water, but every auto-rotation over land caused an explosion no matter how lightly I landed.)
Jets too also ALWAYS explode! I've very rarely ever had any chance to eject, hence parachutes are basically useless when flying a jet. I figure my chances have been one in 500.