Helicopter Sikorsky H-19D-3 Serial 55-972 Register 55-3220 used by US Army Aviation Army. Built 1956. Aircraft history and location Aircraft History 55-3220 US Army Aviation 1956-06-05Sikorsky S-55 c/n 55-972, ff:? del US Army as H-19D-3, 55-3220, 05Jun56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send