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> What difference does it make when the actual hardware is still flawed?

Pilots often know a great deal about the general design qualities of the planes they fly. Defective parts happen, parts wear down, sensors break, etc. When a sensor or mechanism breaks, pilots recognize the symptom and override the feature that uses the broken part.

737 MAX tries to bolt the big engine on the little plane (old design), with minimal changes. This plane may not be necessarily defective on its own, the MCAS was created to compensate. But it will activate incorrectly with a defective sensor. MCAS was designed not be overridable (or optionally so, if you shell out for it?). Why not put in an override? Because Southwest offered Boeing a financial incentive bonus if they provided 737 MAX with minimal/no new training requirement. If the plane has a new indicator light and a new switch to override a feature, you have to train pilots on how and when to do so. Instead, Boeing decided to "just" rely on MCAS.

> Boeing can convince AA and Southwest pilots to give them vote of confidence

Pilots have the most to lose, their trust should be valuable.



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