If you're a good pilot it's not hard to survive being shot down in a chopper. As for planes, I would love for some sort of damage reduction for emergency landings, ie instead of just turning to a flaming wreck (unless you sustain MASSIVE damage) you lose control/functionality depending on where you've been hit, and if you can land belly down at a low angle and not crash into anything, possibly survive.
Certainly for the prop planes, I imagine they could go down fairly hard without killing everyone. It's not as if they're got the massive forces supersonic jets have acting on them, you'll be going a lot slower when you hit the ground, and the generally wider and straighter wingspan gives them a little more lift while gliding.