In December 2006, the U.S. Army's Aviation Applied Technology Directorate (AATD) solicited proposals for the 3000 shp Advanced Affordable Turbine Engine (AATE) free-turbine turboshaft to replace the GE T700 that currently power the UH-60 Black Hawk and AH-64 Apache rotorcraft, leveraging the DoD/NASA/DOE VAATE program.
Refitting the existing fleet of twin-engine Black Hawks and Apaches would require a total of 6,215 engines, including spares.

Any aircraft that currently uses the T700 or its commercial derivative, the CT7, also could be re-powered by the AATE, including commercial rotorcraft like the Sikorsky S-92.
Sikorsky is considering it for the single-turbine S-97 Raider instead of its single GE CT7/T700; in addition, AATE could also power the Joint Multi-Role (JMR) helicopter.

In 2007, Honeywell and Pratt & Whitney formed the Advanced Turbine Engine Company (ATEC) joint venture.
The science & technology phase to subsidize development of AATE consisted of two contracts: one was awarded in May 2008 to ATEC for $108 million to develop the HPW3000, and the other was awarded to GE Aviation in late 2007 for the GE3000.
The four-and-a-half year science and technology phase covered durability and performance demonstration testing and was scheduled to conclude in 2013, but tests continued through 2014.

In July 2009, the United States Army announced the development of AATE would continue under the Improved Turbine Engine Program (ITEP); ITEP would result in an engine that would improve the AH-64 and UH-60 hot and high capacities and increase combat radius.
In August 2016, ATEC and GE were awarded 24-month contracts under ITEP to take their engines through preliminary design review; this phase culminated in April 2018 with ATEC and GE demonstrating their prototypes to the Army.

On 1 February 2019, the US Army selected the GE T901 as the winner of the ITEP program, awarding the Engineering and Manufacturing Development (EMD) contract for $517 million.
Later that same month, ATEC protested the selection of the GE T901 over its T900 in a filing with the Government Accountability Office (GAO).
The GAO denied the protest in a filing posted on May 30, 2019.

Critical design review in the second quarter of 2020 will lead to first engine testing in the third quarter of 2021 before flight tests, and a production decision in 2024.
In December 2006, the U.S. Army's Aviation Applied Technology Directorate (AATD) solicited proposals for the 3000 shp Advanced Affordable Turbine Engine (AATE) free-turbine turboshaft to replace the GE T700 that currently power the UH-60 Black Hawk and AH-64 Apache rotorcraft, leveraging the DoD/NASA/DOE VAATE program. Refitting the existing fleet of twin-engine Black Hawks and Apaches would require a total of 6,215 engines, including spares.
Any aircraft that currently uses the T700 or its commercial derivative, the CT7, also could be re-powered by the AATE, including commercial rotorcraft like the Sikorsky S-92. Sikorsky is considering it for the single-turbine S-97 Raider instead of its single GE CT7/T700; in addition, AATE could also power the Joint Multi-Role (JMR) helicopter.
In 2007, Honeywell and Pratt & Whitney formed the Advanced Turbine Engine Company (ATEC) joint venture. The science & technology phase to subsidize development of AATE consisted of two contracts: one was awarded in May 2008 to ATEC for $108 million to develop the HPW3000, and the other was awarded to GE Aviation in late 2007 for the GE3000. The four-and-a-half year science and technology phase covered durability and performance demonstration testing and was scheduled to conclude in 2013, but tests continued through 2014.
In July 2009, the United States Army announced the development of AATE would continue under the Improved Turbine Engine Program (ITEP); ITEP would result in an engine that would improve the AH-64 and UH-60 hot and high capacities and increase combat radius. In August 2016, ATEC and GE were awarded 24-month contracts under ITEP to take their engines through preliminary design review; this phase culminated in April 2018 with ATEC and GE demonstrating their prototypes to the Army.
On 1 February 2019, the US Army selected the GE T901 as the winner of the ITEP program, awarding the Engineering and Manufacturing Development (EMD) contract for $517 million. Later that same month, ATEC protested the selection of the GE T901 over its T900 in a filing with the Government Accountability Office (GAO). The GAO denied the protest in a filing posted on May 30, 2019. 
Critical design review in the second quarter of 2020 will lead to first engine testing in the third quarter of 2021 before flight tests, and a production decision in 2024.
Improved Turbine Engine Program