Helicopter Sikorsky H-19D Chickasaw Serial 55-1178 Register 56-4282 used by US Army Aviation Army. Built 1958. Aircraft history and location Aircraft History 56-4282 US Army Aviation 1958-03-12Sikorsky S-55 c/n 55-1178, ff:? del US ARMY as H-19D, 56-4282, 12Mar58. Send Updates Use APP to upload photo @ (optional) When Now? / / Send