The 171st Special Operations Aviation Squadron (171 SOAS) is an Australian Army helicopter squadron equipped with NHIndustries MRH-90 Taipan 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 as the regiment's sole operational squadron. In December 2021, the squadron completed its transition from the retiring Sikorsky S70A Black Hawk helicopter to the MRH-90 Taipan helicopter.