The ABT-2045 is a reliable and low maintenance cost towable Aircraft Passenger Boarding Stairs designed for enplaning/deplaning passengers to/from an aircraft parked in the airport apron area.
The stair assembly is mounted on a towable chassis and consists of a pivoted lower flight and a telescopic upper flight. The stair can be tilted and extended to achieve the best elevation in its working range.
The unit has four hydraulically-operated vertical stabilizers to provide stability. Mechanical restraint devices are provided to prevent the stairs from lowering and retracting. A mechanical parking brake is automatically applied when the tow bar is lifted.