Specific technical questions.
From a simplified description of the residual high-speed protection in alternate law:- “A nose up command is introduced any time the airplane exceeds VMO / MMO to keep the speed from increasing further, which CAN be overridden by the sidestick.”
Will the protection-generated nose up command result in (time delayed) trim movement, or is trim only activated by a sidestick input?
Is a fly-level stick command interpreted as an override of the protection command? I suspect not as how else will the protection work; thus does the sidestick have to be moved forward to effect the override?
Would the FDR differentiate between a protection-generated nose up command and that of the sidestick?
Are there any default values for VMO / MMO for failure or invalid airspeed / Mach inputs to the limit computations?