The idea of printing wing and turbine are not ready yet and it might takes few more years to accomplish them. As soon as you get internal cavities or holes inside it's good as thrash. You don't want any stress that hits right to where you have internal cavities, it will just be catastrophic.
Which is why Pratt & Whittney are still cautious about printing turbine blade.

But the use of 3D printing airduct in planes is already going on!