What defines the rearward CG limit during weight and balance checks?

The rearward center of gravity (CG) limit is primarily defined as the balance point that should not be exceeded during weight and balance checks. This limit is crucial for the safe operation of the aircraft, as having the CG too far aft can adversely affect the handling characteristics and stability of the aircraft.

When the CG is excessively rearward, it can lead to a condition where the aircraft may be difficult to control, particularly during takeoff and landing. Maintaining the CG within specified limits ensures that the aircraft remains in a manageable configuration, thereby enhancing safety.

While factors such as maximum permissible tail weight, aircraft specifications, and load distribution calculations contribute to determining overall weight and balance, it is the balance point itself—where the CG must be situated—that ultimately defines operational safety.