Originally Posted by shamen123
So, right at the point of alternate law, in manual flight, the important bit of kit which stops any strong input to the rudder pedals shearing off the rear flight surfaces failed? Or am I reading into this too much.
Reading the F/ Control FCOM, rudder travel limit is a function of airspeed: above 350ktas deflection is limited to 4deg, below 150ktas to 35deg with a curved slope in between. Aerodynamically, rudder movements that may be needed at low speed would get you into trouble at higher speeds; limits set for higher speeds, may inhibit control inputs too much at lower speeds. True for many control surfaces on the ac. If you lose reliable airspeed input to the flt control system it will remove the limit.