 To this end, the U.S. Army issued a request for proposals (RFP) for an Advanced Attack Helicopter (AAH) in 1972.The Army specified that the AAH was to be powered by twin General Electric T700 turboshaft engines with 1,500 shp (1,120 kW) each.This was the same powerplant fit specified for a new Army utility helicopter competition that would be won by the Sikorsky S-70 Black Hawk.