The a/t will disconect if a/t fault is sensed by the a/t computer. If what you said about autodisconect during engine failure (i didn't notice,sorry) ,one possible cause that I think of will be electrical failure,maybe due to gen off bus. It's just a guess,though.
And this is for the classic.I will check the ng fcom for diferences.
ps. edited. yes ,as techman says ,the ng has also:"
significant thrust difference along with control wheel roll input of 10 degrees or more,flap up to 10" ,as a cause for at disengagement. So this is your case.
Brgds Alex
Last edited by alexban; 13th Dec 2004 at 17:41.