When approaching an aircraft, what must all operators test to avoid collisions?

When approaching an aircraft, it is essential for operators to test the brakes to prevent potential collisions. Ensuring that the brakes are functioning properly is critical because it allows the operator to stop or control the movement of the aircraft effectively. In the context of ramp operations, where there may be limited space and other personnel or equipment nearby, having reliable brakes ensures that operators can maneuver safely without posing a risk to themselves, the aircraft, or any surrounding vehicles and structures.

Having well-functioning brakes contributes significantly to situational awareness and control, especially in busy airport environments where multiple aircraft, ground vehicles, and personnel interact. This focus on brake functionality directly addresses the need for safety during ground operations, making it a primary concern when approaching an aircraft.