use VR Map!
place a vehicle respawn module and configure it with:

30,
200,
999,
createVehicleCrew (_this select 0),
startposition,
random,
delete,
deactivate,
activate,
yes

place an emty "B_Heli_Transport_01_F", name it Heli1 and sync it with the module.

place your player on the Map.

start the mission.

now you can test several options in the Debug-console:
Heli1 setHitPointDamage ["HitHRotor",1];
Heli1 setdamage 0.91;
Heli1 setposATL [(getposATL Heli1 select 0) + 400,(getposATL Heli1 select 1) + 400,getposATL Heli1 select 2];

combine them, you will see what the problem is.

use this in the Codeformular for a temporary walkaround;

null = [_this select 0] spawn {
private ["_veh"];
_veh = _this select 0;
waitUntil{!canMove _veh || !alive _veh};
{_x leaveVehicle _veh} forEach crew _veh}; //or {deleteVehicle_x} forEach crew _veh};