The 173rd Aviation Squadron is an Australian Army helicopter squadron equipped with S70A Black Hawk helicopters and provides support to the Special Operations Command. The Squadron is based at Luscombe Airfield, Holsworthy Barracks, Sydney and forms part of the 6th Aviation Regiment. The Squadron originally operated fixed-wing aircraft designated as the 173rd General Support Squadron and was later renamed the 173rd Surveillance Squadron. In 2010, the Squadron was re-designated as 173rd Aviation Squadron when it transitioned to rotary aircraft.