Helicopter Sikorsky H-19D Chickasaw Serial 55-917 Register 55-3191 used by US Army Aviation Army. Built 1955. Aircraft history and location Aircraft History 55-3191 US Army Aviation 1955-12-23Sikorsky S-55 c/n 55-917, ff:? del US Army as H-19D, 55-3191, 23Dec55. Send Updates Use APP to upload photo @ (optional) When Now? / / Send