Helicopter Sikorsky H-19D Chickasaw Serial 55-836 Register 54-1422 used by US Army Aviation Army. Built 1955. Aircraft history and location Aircraft History 54-1422 US Army Aviation Sikorsky S-55 c/n 55-836, ff:? del US Army as H-19D, 54-1422, unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send