Helicopter Sikorsky H-19D Chickasaw Serial 55-1243 Register 57-5947 used by US Army Aviation Army. Built 1958. Aircraft history and location Aircraft History 57-5947 US Army Aviation 1958-11-17Sikorsky S-55 c/n 55-1243, ff:? del US Army as H-19D, 57-5947, 17Nov58. Send Updates Use APP to upload photo @ (optional) When Now? / / Send