Helicopter Sikorsky H-19D Chickasaw Serial 55-1171 Register 57-1617 used by US Army Aviation Army. Built 1958. Aircraft history and location Aircraft History 57-1617 US Army Aviation 1958-02-15Sikorsky S-55 c/n 55-1171, ff:? del US Army as H-19D, 57-1617, 15Feb58. 1973-04-21 21apr73 at the Technical Centre, El Reno, Ok Send Updates Use APP to upload photo @ (optional) When Now? / / Send