Flying straight and level... assuming no asymmetries/imbalances in flight with the A/P engaged.... if you added manual aileron trim, wouldn't the autopilot cancel this out, returning the control wheel to neutral?
Surely the crew should have noticed that the wheel wasn't straight (Trim input is backdriven)...unless, of course, this 6~8" equates to very little at the control wheel. Seems a lot aerodynamically, though.
Actually, the "neutral" position is 0.5 degrees down (from the faired position), but I'm not sure you would notice this.
With a setup like this (767), I can't see how disconnecting the A/P would return the trim to neutral.
Strange indeed.
Rgds.
NSEU
Last edited by NSEU; 15th Jan 2009 at 00:08.