The fuel system incorporates an auto balance system which maintains the fuel load in each wing tank to within ___________ pounds of the other wing.

The fuel system of the T-6B incorporates an auto balance feature designed to keep the fuel load in each wing tank as even as possible during flight operations. This is crucial for maintaining aircraft stability and performance, as uneven fuel distribution can lead to unwanted yaw and roll tendencies.

The correct answer specifies that the auto balance system maintains the fuel load within 20 pounds of the other wing. This tight tolerance helps ensure that the airplane remains balanced, particularly important during maneuvers or when fuel is being consumed, as the weight distribution can significantly affect controllability and the center of gravity.

Understanding this specific limit of 20 pounds is essential for pilots and maintenance crews as it informs them of the system's capabilities and limits, ultimately contributing to safer flight operations. The other options present higher thresholds, which could lead to more significant discrepancies in fuel load balance, potentially affecting aircraft performance and safety.