Helicopter Sikorsky H-19A Chickasaw Serial 55-159 Register 51-3888 used by US Air Force USAF. Built 1952. Aircraft history and location Aircraft History 51-3888 US Air Force 1952-06-12Sikorsky S-55 c/n 55-159, ff:? del USAF as H-19A, 51-3888, 12Jun52. Send Updates Use APP to upload photo @ (optional) When Now? / / Send