Helicopter Sikorsky H-19D Chickasaw Serial 55-665 Register 52-7622 used by US Army Aviation Army. Built 1954. Aircraft history and location Aircraft History 52-7622 US Army Aviation 1954-02-18Sikorsky S-55 c/n 55-665, ff:? del US Army as H-19D, 52-7622, 18Feb54. Send Updates Use APP to upload photo @ (optional) When Now? / / Send