Helicopter Sikorsky H-19D Chickasaw Serial 55-600 Register N3498 52-7612 used by US Army Aviation Army. Built 1953. Aircraft history and location Aircraft History 52-7612 US Army Aviation 1953-12-16Sikorsky S-55 c/n 55-600, ff:? del US Army as H-19D, 52-7612, 16Dec53. N3498 - Send Updates Use APP to upload photo @ (optional) When Now? / / Send