Model 228 stair services doorsill heights up to 228" (5.8 m) and meets SAE ARP 836 and 1247. Maneuverable, with full view operator’s station—provides easy docking at most aircraft doorsills including 747s. Ramp-specific wrap-around tubular steel bumper helps deflect impacts. Modular engine/transmission package makes maintenance and repairs quick and simple.Available in Gas, LP, Dual Fuel, Diesel & Electric (AC & DC).Electric field retrofit kits also available.