What happens when aircraft flies above limitt?

Answer 1

There are several limits in aviation, e.g., speed, angle of attack, gravitational forces ("gs"), to name a few, and there are consequences to exceeding all of them. This question refers to flying above the limit, which logically intends a reference to altitude.

Nothing happens when an aircraft flies above the altitude limit because an aircraft can't fly above the limit. That's why the 'limit' is the 'limit.' The limit is the limit because all the negatives keeping an aircraft down (gravity, drag, induced drag, etc.) can no longer be overcome by the available power of the engine(s) and the aircraft cannot climb any higher: the limit. There is no "flying above it." The question is preposterous.