To return co-pilot units:
private _fnc_getCoPilots =
{
private _copilotTurrets = allTurrets _this select { getNumber ([_this, _x] call BIS_fnc_turretConfig >> "isCopilot") > 0 };
private _copilots = _copilotTurrets apply { _this turretUnit _x };
_copilots;
};
hint str (heli call _fnc_getCoPilots);