Wings and tail, of course: https://en.wikipedia.org/wiki/Alaska_Airlines_Flight_261 https://en.wikipedia.org/wiki/Alaska_Airlines_Flight_261 And assuming the w

Wings and tail, of course: https://en.wikipedia.org/wiki/Alaska_Airlines_Flight_261 https://en.wikipedia.org/wiki/Alaska_Airlines_Flight_261 And assuming the wings haven’t lost their lift due to ice: https://en.wikipedia.org/wiki/American_Eagle_Flight_4184 https://en.wikipedia.org/wiki/American_Eagle_Flight_4184 Planes can glide, but there’s still lots of ways to drive one straight into the ground.