They added MCAS because the larger engines increase the propensity of the aircraft to pitch up at high angles of attack. This is against FAA rules and renders t

They added MCAS because the larger engines increase the propensity of the aircraft to pitch up at high angles of attack. This is against FAA rules and renders the aircraft uncertifiable. Their solution was to add MCAS which is designed to change the aircraft's stall characteristics "in software" so that it can be certified without major design changes. If they want to remove MCAS then they need to enlarge the undercarriage to give the aircraft more ground clearance, so that the engines can be placed further back. Such a major change to the aircraft's design would mean the 737 MAX could not share a type rating with the other 737s or at least would require significant differences training (not an iPad lesson)