Helicopter Sikorsky H-19D Chickasaw Serial 55-1218 Register 57-5935 used by US Army Aviation Army. Built 1958. Aircraft history and location Aircraft History 57-5935 US Army Aviation 1958-07-09Sikorsky S-55 c/n 55-1218, ff:? del US Army as H-19D, 57-5935, 09Jul58. Send Updates Use APP to upload photo @ (optional) When Now? / / Send