The primary purpose of the anti-skid system control box is to prevent what?

The primary purpose of the anti-skid system control box is to prevent landing with the brakes applied or more accurately, to prevent wheel lock-up during braking on landing. This system monitors the speed of each wheel and compares it to the aircraft's overall ground speed. If it detects that a wheel is about to lock up, the system automatically reduces brake pressure to that wheel, allowing for continued traction and control. This allows the pilot to maintain steering capability and prevents a loss of control during the landing phase.

While the system also helps in managing wheel speed to improve braking effectiveness, its critical role is during landing to ensure that the wheels do not skid, especially on slippery surfaces, which connects indirectly to the control of braking forces but isn’t as directly linked as preventing lock-up. Hence, the anti-skid system's overarching function is to enhance safety by allowing controlled braking and reducing the risk associated with landing when brakes are applied.