Helicopter Sikorsky H-19D Chickasaw Serial 55-872 Register 54-1437 used by US Army Aviation Army. Built 1955. Aircraft history and location Aircraft History 54-1437 US Army Aviation 1955-04-02Sikorsky S-55 c/n 55-872, ff:? del US Army as H-19D, 54-1437, 02Apr55. Send Updates Use APP to upload photo @ (optional) When Now? / / Send