No one will try to _____ a moving aircraft or tow vehicle.

• A. board or leave
• B. push
• C. pull
• D. detach

Answer: (A)

Safety around moving aircraft and tow vehicles means never boarding or leaving them while they are in motion. Entering or exiting a moving unit is dangerous because sudden starts, stops, or shifts can push you into aircraft surfaces, moving tow equipment, or into the path of other personnel. That’s why the natural completion of the sentence is that no one will try to board or leave a moving aircraft or tow vehicle—you only approach, board, or depart when the equipment is stopped and secured. While pushing, pulling, or detaching a moving unit would also be hazardous, the rule highlighted here focuses on safe entry and exit, which must occur only when everything is stationary.