GE Aviation hosted the U.S. Army for the successful Preliminary Design Review (PDR) of the T901-GE-900 engine in early March. The T901 is GE Aviation's engine for the Improved Turbine Engine Program (ITEP), the U.S. Army's undertaking to re-engine its Boeing AH-64 Apaches and Sikorsky UH-60 Black Hawks. The PDR is a major milestone within the Technology Maturation and Risk Reduction (TMRR) contract, a $102 million, 24-month contract the Army awarded GE in September 2016. The Army is in the process of down selecting to one engine manufacturer for the Engineering and Manufacturing Development (EMD) phase by the end of 2018. The U.S. Army Contracting Command (ACC), based at Redstone Arsenal in Huntsville, Ala., released its request for proposals for the EMD last November.