Originally Posted by backofthedrag
If PF has unreliable speed indications and overspeed protection comes in , forcing the nose-up , could the aircraft stall whilst the pilot is pushing stick full down whilst the overspeed protection is forcing the nose up regardless of inputs due to the wrong speed being sensed.
Or does AofA protection over-rule overspeed protection or would now alternate law without protections be the case.
Such scenario would need to have at least two airspeed indicators to lie in a similar way to trigger the High Speed Protection.
But then, as Normal Law is maintained, and as you mention, AoA protection would enter the game.
IMO the Airbus would not stall in such situation, but as long as the overspeed indication remains, a tricky battle between 2 protections could take place ...