Originally Posted by
safetypee
derjodel, #187.
Q a). Presumably both Boeing and the FAA believe that a single MCAS cycle is sufficient to meet certification requirements for normal operation.
A single MCAS cycle with limited input. But the thing is, we know that Boeing test pilots requested to increase MCAS input, right? If memory serves me well, the original input was insufficient.
As for the single cycle... MCAS is triggered at specific AOA, presumably to comply with elevator feel, right? I mean, that was the original story. Now Boeing themselves are saying it's in order to "to enhance the pitch stability of the airplane", which does kinda smell like anti-stall system.
Anyway, let's assume AOA is exceeded (due to nacelle lift), MCAS is triggered, but AOA remains above threshold and even increases due to nacelle lift.. is this now the same event or new event? If AOA newer fell below threshold, it's the same event, right? But then, what's the point? Why have MCAS at all? Unless a single cycle is the magic potion. But if it is, why wasn't it designed as such in the first place. If a single cycle is enough, then surely Boeing is guilty for the two crashes?