List of Units Unit From To 1st Aviation Regiment - 161 R, - Robertson Barracks 1966 5th Aviation Regiment - Al Azraq,Townsville 1987 6th Aviation Regiment - Holsworthy Barracks,Oakey 2008   Bases and Locations Base Unit Darwin Intl 161 Reconnaissance Squadron Holsworthy Barracks 6th Aviation Regiment Oakey 6th Aviation Regiment Robertson Barracks 1st Aviation Regiment Townsville 5th Aviation Regiment   Model Types Model Del'd From To B AH-64E Apache 2025 Sikorsky UH-60M Black Hawk 2023 AW AW139 2021 B CH-47F Chinook 14 2015 NHI MRH90 Taipan 2009 2023 EC Tiger ARH 22 2004 B CH-47D Chinook 8 1995 2016 Sikorsky S-70A-9 Black Hawk 39 1989 2021 CAC ca-32 kiowa 1972 Bell 47G-3 65 1965 1975