Helicopter Bell AH-1G Cobra Serial 21089 Register 71-21018 used by US Army Aviation Army. Aircraft history and location Aircraft History 71-21018 US Army Aviation US Army. 1982-07-23 A EGVP Army Air Day Participated in Jul 1982 Middle Wallop Air Day - 2000-10 B Darwin Aviation Museum Exhibit preserved at Australian Aviation Heritage Centre in US Army colours. Present since at least Oct 2000, still there Dec 2012. Send Updates Use APP to upload photo @ (optional) When Now? / / Send