Helicopter Sikorsky H-19D Chickasaw Serial 55-852 Register 54-1426 used by US Army Aviation Army. Built 1955. Aircraft history and location Aircraft History 54-1426 US Army Aviation 1955-02-08Sikorsky S-55 c/n 55-852, ff:? del US Army as H-19D, 54-1426, 08Feb55. Send Updates Use APP to upload photo @ (optional) When Now? / / Send