Helicopter Sikorsky H-19D Chickasaw Serial 55-601 Register 52-7613 used by US Army Aviation Army. Built 1953. Aircraft history and location Aircraft History 52-7613 US Army Aviation 1953-12-16Sikorsky S-55 c/n 55-601, ff:? del US Army as H-19D, 52-7613, 16Dec53. Send Updates Use APP to upload photo @ (optional) When Now? / / Send