why doesn’t the MCAS handle the disagree correctly while the autopilot can?
The autopilot systems cannot cope with AoA disagree, that's why MCAS came into play. The Ethiopian pilots (for some reason) kept trying to engage autopilot. Unfortunately for them MCAS is only needed when autopilot is disabled.
The autopilot systems cannot cope with AoA disagree, that's why MCAS came into play. The Ethiopian pilots (for some reason) kept trying to engage autopilot. Unfortunately for them MCAS is only needed when autopilot is disabled.