Helicopter Sikorsky H-19D Chickasaw Serial 55-909 Register 55-3186 used by US Army Aviation Army. Built 1955. Aircraft history and location Aircraft History 55-3186 US Army Aviation 1955-11-18Sikorsky S-55 c/n 55-909, ff:? del US Army as H-19D, 55-3186, 18Nov55. 1972 Exhibit displayed at Michigan Military Air Museum, Saginaw. Send Updates Use APP to upload photo @ (optional) When Now? / / Send