Helicopter Sikorsky H-19B Chickasaw Serial 55-776 Register 53-4431 used by US Air Force USAF. Built 1954. Aircraft history and location Aircraft History 53-4431 US Air Force 1954-09-17Sikorsky S-55 c/n 55-776, ff:? del USAF as H-19B, 53-4431, 17Sep54. Send Updates Use APP to upload photo @ (optional) When Now? / / Send
