Appears to be a very good question since Iīve now read through the relevant sections of my manuals and canīt find an actual value.. From what I have done in the sim as far as go arounds on one engine from triple-channel appoaches I would assume the autopilot has full authority over the rudder beause of the abrubt yaw when the G/A roll mode is terminated.. It has atleast authority to counter any yaw when full G/A thrust is applied to the "live" engine.. Hope it might have helped..
