Why are wheel chocks and tie-downs critical during pre-tow, and when are they removed?

• A. They are optional on the ramp.
• B. They only serve decorative purposes on the ramp.
• C. They must be removed after the first brake test to prevent drag.
• D. They prevent unintended movement before and during positioning and are removed only after brake tests and before taxiing.

Answer: (D)

Wheel chocks and tie-downs are safety measures that keep the aircraft from moving while you’re preparing to tow. Chocks block each wheel so the airplane can’t roll, and tie-downs add extra restraint against wind or incidental movement during positioning on the ramp. They stay in place through the braking checks to ensure the airplane remains stationary while you verify the brakes can hold.

They are removed once brake tests are complete and indicate the brakes can securely hold the aircraft, and before taxiing. Removing them at that point prevents any drag or interference with steering and tire rotation as you start moving under tow.