Helicopter Sikorsky H-19D Chickasaw Serial 55-868 Register 54-1433 used by US Army Aviation Army. Built 1955. Aircraft history and location Aircraft History 54-1433 US Army Aviation 1955-03-24Sikorsky S-55 c/n 55-868, ff:? del US Army as H-19D, 54-1433, 24Mar55. Send Updates Use APP to upload photo @ (optional) When Now? / / Send