An aircraft must be loaded and operated in such a way that the center of gravity (CG) stays within the approved limits during all phases of flight. This is done to ensure... - PPL(A) EN

Question id 6 - Performance and flight planning - PPL(A) - Private Pilot License

That the aircraft does not exceed the maximum permissible airspeed during a descent.

That the aircraft does not stall.

That the aircraft does not tip over on its tail while it is being loaded.

Both stability and controllability of the aircraft.