If the airplane is under maximum gross weight but the CG is too far forward, what is the appropriate corrective action?

When an airplane is under maximum gross weight but has a center of gravity (CG) that is too far forward, moving the appropriate amount of weight aft is the correct action to take. This is because a forward CG can result in increased stability but may also make the aircraft less maneuverable and affect performance during various phases of flight, such as takeoff and landing.

Adjusting the weight toward the aft (rear) of the aircraft helps shift the CG back into a more balanced and desirable range, which can improve the aircraft's handling characteristics and overall performance. A properly balanced CG is critical for safe and efficient flight, allowing the pilot to maintain control and achieve optimal flight conditions.

In contrast, moving the weight forward or reducing total weight further does not address the problem of a forward CG and may exacerbate handling difficulties. Similarly, the idea that the CG is allowable if the total weight is below maximum does not consider the importance of the CG's position relative to flight dynamics and safety.