Helicopter Sikorsky H-19A Chickasaw Serial 55-110 Register 51-3861 used by US Air Force USAF. Built 1952. Aircraft history and location Aircraft History 51-3861 US Air Force 1952-04-03Sikorsky S-55 c/n 55-110, ff:? del USAF as H-19A, 51-3861, 03Apr52. 1954-04-15 w/o 15apr54 in Marshall Islands Send Updates Use APP to upload photo @ (optional) When Now? / / Send