Helicopter Sikorsky H-19C Chickasaw Serial 55-243 Register 51-14278 used by US Army Aviation Army. Built 1952. Aircraft history and location Aircraft History 51-14278 US Army Aviation 1952-10-24Sikorsky S-55 c/n 55-243, ff:? del as H-19C, 51-14278, 24Oct52. Send Updates Use APP to upload photo @ (optional) When Now? / / Send