Are you suggesting that a control jam in a Chinook could have caused a turn (onto a heading that the HP just happened to have set) and allow an unstable a/c to fly over that last leg (waypoint change to impact, a significant length in such an emergency) without any audible sign of the pilot trying to regain control?
Forgive me Walter, but is it not accepted fact that there was no need to execute the turn AT the Waypoint? The point made by Sqn Ldr Burke, denied at the time, was that at the end of a straight run, he had experienced sudden UFCMs when inputting the demand for a turn. And that this sudden change could take him in the opposite direction to that intended.
Could such an UFCM have been a contributory factor? I'll leave that to pilots to discuss. What is certain is that MoD thought it prudent to hide this fact for many years. Just as they concealed the positively dangerous software. It is called misleading by omission. I wonder what an independent inquiry will make of that?