You have to enable visual damage
visual_damage=1
and then drive up to a tree or something in slew mode, release, and catch it in slew again. before it terminates.
You really have to try quite hard to get the crash damage, the Ford Trimotor can be quite satisfying, loses whole engines!
I suppose once you've done that, then you never go back and do it again...unless there's a screenshot contest allowing only stock planes!





