Helicopter Sikorsky H-37A Mojave Serial 56-077 Register 55-640 used by US Army Aviation Army. Built 1958. Aircraft history and location Aircraft History 55-640 US Army Aviation 1958-03-28Sikorsky S-56, c/n 56-077, ff:? del US ARMY as H-37A, 55-640, 28Mar58 redesig CH-37A, Oct 62 conv CH-37B, unk wfu & soc unk. 1964-08-14w/o 14aug64 Send Updates Use APP to upload photo @ (optional) When Now? / / Send
