Helicopter Sikorsky H-37A Mojave Serial 56-139 Register 58-994 used by US Army Aviation Army. Built 1959. Aircraft history and location Aircraft History 58-994 US Army Aviation 1959-11-18Sikorsky S-56, c/n 56-139, ff:? del US ARMY as H-37A, 58-994, 18Nov59 redesig CH-37A, Oct 62 conv CH-37B, unk wfu & soc unk. Send Updates Use APP to upload photo @ (optional) When Now? / / Send
