Description
On a vertical rectangle arched at the top and bottom, edged with a 1/8 inch (.32cm) golden orange border, 2 inches (5.08cm) in width and 3 inches (7.62cm) in height overall, a white lightning bolt issuing from top bearing the silhouette of a diving Peregrine falcon.

Symbolism
Ultramarine blue and golden orange are the colors associated with U. S. Army Aviation. The lightning bolt and the falcon underscore the unit's combat mission, to attack and destroy enemy troops and armor from the sky.

Background
The shoulder sleeve insignia was originally approved for the 66th Aviation Brigade on 19 July 1989. It was redesignated for the 66th Aviation Command on 14 June 2007. (TIOH Drawing Number A-1-757)