Originally Posted by
22/04
To restore confidence in the aircraft - what?
Three AOA sensors inputting to MCAS two of which must agree.
Limitation to the forward trim provided by MCAS?
They would do it for me. How difficult/expensive to fit/retrofit.
The AoA vanes on each side of the nose are not really two redundant sensors requiring a third to failsafe the system. This is because you don't necessarily expect them to agree during maneuvering, especially with a yaw component, They are kind of like 1.5 sensors, because there could be some consistency detection between them (i.e. they can't be very different over time), which could be used to improve the input side of MCAS. For the kind of redundancy I think you are suggesting, you would need 3 vanes per side.