Helicopter Sikorsky H-19A Chickasaw Serial 55-172 Register 51-3893 used by US Air Force USAF. Built 1952. Aircraft history and location Aircraft History 51-3893 US Air Force 1952-07-04Sikorsky S-55 c/n 55-172, ff:? del USAF as H-19A, 51-3893, 04Jul52. 24aug62 to MAP, dest unk (Argentina ?) Send Updates Use APP to upload photo @ (optional) When Now? / / Send