Helicopter Sikorsky H-37A Mojave Serial 56-012 Register 54-996 54-995 used by US Army Aviation Army. Built 1956. Aircraft history and location Aircraft History 54-995 US Army Aviation 1956-10-26Sikorsky S-56, c/n 56-012, ff:? del US Army as H-37A, 54-995, 26Oct56 wfu & soc unk. For 54-996 see also 1956 h-37a 56-014 54-996 US Army Aviation 1966-03-20w/o 20mar66 Send Updates Use APP to upload photo @ (optional) When Now? / / Send