Helicopter Sikorsky H-19C Chickasaw Serial 55-273 Register 51-14294 used by US Army Aviation Army. Built 1952. Aircraft history and location Aircraft History 51-14294 US Army Aviation 1952-11-18Sikorsky S-55 c/n 55-273, ff:? del as H-19C, 51-14294, 18Nov52. Send Updates Use APP to upload photo @ (optional) When Now? / / Send