or up it tells back there, it has a sensor that tells you where your elevator went. it also confirm that the movements the pilot made were carried out by the aircraft. >> right. will it be able to tell us the crucial thing. say the pilot started the decan she not descent, it will say whether the pilot kept going. >> this is one of the things that's interesting. it's a different philosophy. you're always on auto-pilot because you're flying a computer. when you're controlling the airplane and asking the computer to do something and it decides how to do it. there's way to cut those off and go to alternate and form of law as they call it direct that you can fly the airplane directly. you're always on there. that means if you push the side stick controller and start a descent, if you don't touch it it's going to keep on until it