The ST 18-39 Passenger Stair is a towed airport equipment with hydraulic drive for boarding / off boarding passengers from / to aircraft with boarding threshold height between 1800 mm and 3900 mm.
The ST 18-39 Passenger stair features a rear wheel-assisted movement system for an easy approach to the aircraft.
1800 to 3900 mm
Mounted on custom-made towable chassis which incorporates , diesel engine, stair section, electric system and associated hydraulics.
Ramp cylinders and outriggers. All cylinders with pilot overcentre valves