ground airport equipment [5]
Equipment and materials for preparing an aircraft for its next flight; this includes cleaning, performing checks, refueling and boarding.
passenger transfer vehicle 
Vertically adjustable vehicle with a cabin for transporting passengers between the aircraft and the terminal.
universal step 
Mobile staircase that is positioned manually at an aircraft door to allow passengers to enter or exit.
mobile passenger stairs 
Truck that carries a telescopic staircase, which is positioned at an aircraft door to allow passengers to enter or exit.