If every aircraft has such pitch up tendencies, why did only the 737MAX violate regulation? That reg says: >No abnormal nose-up pitching may occur. The longit

If every aircraft has such pitch up tendencies, why did only the 737MAX violate regulation? That reg says: >No abnormal nose-up pitching may occur. The longitudinal control force must be positive up to and throughout the stall. (how do airbus planes pass that I wonder....) I guess most planes are "not abnormal" but the behavior of the MAX crossed into "abnormal"