For Crashes:
1. Set up Transport Support for a mission via the Editor
2.Go in-game and call in for pick up
3.Repeat a few times in varying areas.
4.Notice that the Heli picks reasonable spots to land, but often crashes upon landing, commonly due to leaning in one direction too much, hitting its rotors.
For hovering indefinitely:
1. Same as the above Step 1
2.Same as the above Step 2
3. When you get picked up, tell the chopper to drop you off within 1KM of enemies
4. Observe how it hovers in place near drop off point indefinitely.