A340 rudder trim activation
 

A right rudder trim activation of about 2,0 units, is being observed. Although logged mechanics could not find the reason....An air test,indicated that when AP is set to OFF, and manual flight with "dead stick" is achieved, aircraft flies level and straight..When rudder trim is zeroed , left bank of 5 degrees, plus a right slip observed...Engineer on board, through ACMS informed me that the problem is due to right high speed aileron drop of approx. 1 degree.....Would like to be informed if anyone of you, experienced something identical with this type of aircraft. Thks!:ok:

Heh - more seriously though, if it were a software problem you'd expect to see the same or similar behaviour on more than one airframe. At a guess I'd say the issue is either the actuator extending further than it should be, or the sensor reporting the position incorrectly.

Which in a way, may lead in "hardover rudder deflection"...? Or so....:{