[caconym_]

> To convince me that 737 MAX without the "properly functioning MCAS" isn't inherently dangerous under higher angles of attack you'd have to provide some explicit proofs.

I am legitimately curious, do you have any explicit proofs of the converse, that (as you say) "the behaviour without MCAS on 737 MAX is that minimal movements of pilot’s controls effectively activate what would be considered “amplification” of nose up movement, resulting in an uncontrollable plane and sure crash"?

The standard should be that a an unimpaired pilot properly trained in flying the aircraft will normally (practically) be in no danger of a "sure crash".

[acqq]

> The standard should be that a an unimpaired pilot properly trained in flying the aircraft will normally (practically) be in no danger of a "sure crash".

Exactly. And under that assumptions 737 MAX with no MCAS was never certified. Boeing didn't even want to admit that MCAS even exists to avoid even showing the flight characteristic of the plane "without MCAS." It's on Boeing to prove "737 MAX without MCAS" is safe, and up to now they did all they could to avoid that, and I expect they'll do more of that unless there is a pressure outside of both Boeing and FAA.

[caconym_]

But there is a distinction between never getting certified because it is not safe, and never getting certified because Boeing didn't want to certify it as a new aircraft, because they wanted to sell it with the value proposition of not having to train pilots on a new type. Is that not correct?

So it seems to me that the discussion in this subthread is really around that point: could the aircraft have been certified as a new type without the horribly dangerous MCAS system in place to paper over the change in flight characteristics?

You seem to be saying no, and the other guy says yes, but you seem more to be talking past each other than offering proof of your assertions. He at least did point out (though without citing any proof, I think) that the 777 had a similar issue and was certified anyway (and I don't believe 777s have been falling out of the sky because of it). But, obviously, this is a different aircraft.