Helicopter Sikorsky H-19D Chickasaw Serial 55-496 Register 52-7601 used by US Army Aviation Army. Built 1953. Aircraft history and location Aircraft History 52-7601 US Army Aviation 1953-09-14Sikorsky S-55 c/n 55-496, ff:? del US Army as H-19D, 52-7601, 14Sep53. soc Send Updates Use APP to upload photo @ (optional) When Now? / / Send