Aeroplane control scripts

I know this has been asked before. I have spent hours trawling through everything I can find. There is no info on how to make a script for flying an aeroplane. It doesn't need to be complicated, it can be as simple as left and right to rotate, and up and down to veer up and down.

So here it is; how do you make a flight script?

Duck answered this some time ago. =)

http://forum.unity3d.com/threads/43984-Unity-testproject-a-little-flightsim

in this link there is lot of already developed airplane project.you just download it and try to learn the scripting which is inside.you will under stand how to control the aeroplane