Helicopter Sikorsky H-19D Chickasaw Serial 55-520 Register N55233 52-7602 used by US Army Aviation Army. Built 1953. Aircraft history and location Aircraft History 52-7602 US Army Aviation 1953-10-12Sikorsky S-55 c/n 55-520, ff:? del US Army as H-19D, 52-7602, 12Oct53. N55233 - preserved Edwards to Mc Minnville, OR Send Updates Use APP to upload photo @ (optional) When Now? / / Send