Reply to post: Re: The reason that the Max series need MCAS

UK joins growing list of territories to ban Boeing 737 Max flights as firm says patch incoming

Nonymous Crowd Nerd

Re: The reason that the Max series need MCAS

Having only two sensors is the real problem. If there's a failure, there's no way for the software to decide which is wrong and therefore work out the real angle of attack. The real answer is to add an extra sensor, like you say - or more likely two extra sensors for symmetry.

This is why it's a potential financial black hole for Boeing. Adding the extra sensors to existing planes, revising the software to support voting in case of a failure, and testing (properly this time) is an absolute shed-load of work. It would be realistically three months to get even the first grounded planes safely airborne.

Any other approach, though, risks the possibility of a third accident which would put Boeing into bankruptcy.

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