Helicopter Sikorsky H-19B Chickasaw Serial 55-752 Register 53-4416 used by US Air Force USAF. Built 1954. Aircraft history and location Aircraft History 53-4416 US Air Force 1954-08-06Sikorsky S-55 c/n 55-752, ff:? del USAF as H-19B, 53-4416, 06Aug54. Send Updates Use APP to upload photo @ (optional) When Now? / / Send