Helicopter Sikorsky H-19C Chickasaw Serial 55-250 Register N74899 51-14285 used by US Army Aviation Army. Built 1952. Aircraft history and location Aircraft History 51-14285 US Army Aviation 1952-11-05Sikorsky S-55 c/n 55-250, ff:? del as H-19C, 51-14285, 05Nov52. N74899 - Send Updates Use APP to upload photo @ (optional) When Now? / / Send