Helicopter Sikorsky H-19D Chickasaw Serial 55-1249 Register 57-5952 used by US Army Aviation Army. Built 1958. Aircraft history and location Aircraft History 57-5952 US Army Aviation 1958-12-09Sikorsky S-55 c/n 55-1249, ff:? del US Army as H-19D, 57-5952, 09Dec58. Send Updates Use APP to upload photo @ (optional) When Now? / / Send