Two T901 Improved Turbine Engines Arrive at Sikorsky for Black Hawk Helicopter Modernization www.defensemirror.com/news/37149/T...#T901#ImprovedTurbineEngines#UH60M#BlackHawkHelicopter#Sikorsky#LockheedMartin#GEAerospace#AviationTechnology#MilitaryInnovation#HelicopterEngine