Helicopter Sikorsky H-19B Chickasaw Serial 55-634 Register 52-7531 used by US Air Force USAF. Built 1954. Aircraft history and location Aircraft History 52-7531 US Air Force 1954-03-17Sikorsky S-55 c/n 55-634, ff:? del USAF as H-19B, 52-7531, 17Mar54. Send Updates Use APP to upload photo @ (optional) When Now? / / Send
