Helicopter Sikorsky H-19C Chickasaw Serial 55-197 Register 51-14256 used by US Army Aviation Army. Built 1952. Aircraft history and location Aircraft History 51-14256 US Army Aviation 1952-08-12Sikorsky S-55 c/n 55-197, ff:? del as H-19C, 51-14256, 12Aug52. Send Updates Use APP to upload photo @ (optional) When Now? / / Send