Well the Seattle Times quoted an ex-Boeing employee thusly: > A former Boeing executive, speaking on condition of anonymity because discussion of accident inve

Well the Seattle Times quoted an ex-Boeing employee thusly: > A former Boeing executive, speaking on condition of anonymity because discussion of accident investigations is supposed to be closely held, said that Boeing engineers didn’t introduce the change to the flight-control system arbitrarily. > He said it was done primarily because the much bigger engines on the MAX changed the aerodynamics of the jet and shifted the conditions under which a stall could happen. That required further stall protection be implemented to certify the jet as safe.