Helicopter Sikorsky H-19D Chickasaw Serial 55-925 Register 55-3196 used by US Army Aviation Army. Built 1956. Aircraft history and location Aircraft History 55-3196 US Army Aviation 1956-01-18Sikorsky S-55 c/n 55-925, ff:? del US Army as H-19D, 55-3196, 18Jan56. Send Updates Use APP to upload photo @ (optional) When Now? / / Send