Posted on 09/22/2021 1:19:10 PM PDT by ChicagoConservative27
I’m well aware of the 737 - if you think that was purely due to inadequate testing you’re very naive.
More ignorant, imbecilic noise. Some details from an aeronautical engineer, not some fake blowhard poseur.
Implementing MCAS should have presented no problem if thorough work practices had prevailed. They didn’t. We have enough evidence from all the investigations to say that.
Why wasn’t this dangerous reset criteria detected? Because no FMEA (Failure Modes and Effects Analysis) was made in the original MCAS work. This is where all possible failures in inputs to the system and its components are analyzed for their effect.
The consequences of an AoA failure giving a constant high value (which is a very probable failure mode for this sensor) were never analyzed and the severe danger of the wrong reset criteria was not detected.
The leaving of an unlogical reset criteria from the donor system and not analyzing its consequences is where my verdict is “really criminal” as stated in the Times article.
Boeing knows it is using a fail prone trigger system with the single AoA system design. Yet it doesn’t analyze the consequences of such failures other than “the Pilot will fix it”.
https://leehamnews.com/2020/09/14/why-is-the-737-max-safe-now-when-it-wasnt-before/
You need to learn how not to be a troll. You failed miserably.
And you need to learn how not to try to change the subject when you are exposed as a fraud, a poseur.
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