Helicopter Sikorsky H-19D Chickasaw Serial 55-1266 Register 57-5967 used by US Army Aviation Army. Built 1959. Aircraft history and location Aircraft History 57-5967 US Army Aviation 1959-02-24Sikorsky S-55 c/n 55-1266, ff:? del US Army as H-19D, 57-5967, 24Feb59. Send Updates Use APP to upload photo @ (optional) When Now? / / Send