Pugilistic Animus
Airbus FBW does not get into spiral even with one engine fail and TOGA on live engine because the computers try to hold the position. Any tendency to spiral is prevented by computers by applying rudder upto yaw damper's authority and bank is prevented by applying opposite aileron and spoilers. Since yaw dampers cannot apply the required amount of rudder the aircraft does a skidding turn with MAX 5 to 7 degrees of bank. Even in Unreliable speed the aircraft is in alternate law so behaves the same way except it can be stalled or get into overspeed. You must disconnect AP, ATHR and switch off FDs and the a/c will maintain its pitch and bank.