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Its not legal for the MAX to be flown without MCAS. It corrects a control force issue that must be corrected for it to obtain an airworthiness certificate. Cit

• ceejayoz 6y ago
  > Its not legal for the MAX to be flown without MCAS. That's an entirely different claim, though, than this: > Without it, the max is like a very badly designed fighter jet. Boeing isn't taking the "get rid of MCAS" approach, they're taking the "fix MCAS" one. If they wanted to get rid of MCAS, though, they'd have to apply for a new cert, without the "737-NG pilots can fly it just fine" piggybacking they did - pilots would have to be trained to the new aircraft type.