Helicopter Sikorsky H-19B Chickasaw Serial 55-682 Register 52-7563 used by US Air Force USAF. Built 1954. Aircraft history and location Aircraft History 52-7563 US Air Force 1954-04-19Sikorsky S-55 c/n 55-682, ff:? del USAF as H-19B, 52-7563, 19Apr54. Send Updates Use APP to upload photo @ (optional) When Now? / / Send