Provides easy work access for most aircraft. The platform working heights adjust from 4 Ft. to 22 Ft. The AM-1704 stand is the same as AM-1022, with the addition of an enclosed work area for additional safety while on wings surfaces. The AM-1216 stand is the same as the AM-1022, with an additional work platform capable of expanding to various angles for ease of windshield access. Actuation on all three stands is jack screw driven by air motor, with upper and lower limits. Manual-driven hydraulic cylinders are optional.