Helicopter Sikorsky H-19D Chickasaw Serial 55-944 Register 55-3205 used by US Army Aviation Army. Built 1956. Aircraft history and location Aircraft History 55-3205 US Army Aviation 1956-03-12Sikorsky S-55 c/n 55-944, ff:? del US Army as H-19D, 55-3205, 12Mar56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send