Helicopter Sikorsky H-19A Chickasaw Serial 55-152 Register 51-3881 used by US Air Force USAF. Built 1952. Aircraft history and location Aircraft History 51-3881 US Air Force 1952-06-07Sikorsky S-55 c/n 55-152, ff:? del USAF as H-19A, 51-3881, 07Jun52. Send Updates Use APP to upload photo @ (optional) When Now? / / Send