MCAS absolutely should have triggered a recertification. It's essentially meant to make the Max feel like the NG by slightly pulling down to compensate for the

MCAS absolutely should have triggered a recertification. It's essentially meant to make the Max feel like the NG by slightly pulling down to compensate for the angled engines. And we all know how that ended when the plane's angle of attack sensor failed, the backup wasn't being checked, and the pilots didn't know their plane suddenly had an extra system pulling on the trim. Even with the autopilot off. This is normal and expected on Airbus craft and later Boeing planes like the Dreamliner, but not the 737. Oh, and the indicator for your AOA sensors disagreeing? Used to be a physical part of the cockpit, and was moved to an optional addon in the Max. But Boeing then forgot to put the indicator in the glass cockpit. Presumably because their development aircraft all had the option. None of the accident airlines had the option.