After being announced in April 2007, Rolls-Royce and GE Aviation were awarded Phase I contracts in August 2007 to explore concepts, develop and test critical components, and begin preliminary designs of an engine.
[2] GE Aviation was also awarded funds to continue development of their technology demonstration core, which was unexpected as the ADVENT program had originally called for a single contractor to be selected for Phase II.
[7] GE and Pratt & Whitney were selected over Rolls-Royce to continue the AETD program to mature fuel-efficient, high-thrust powerplants.
[2] Under AETD, GE had set new records with the highest demonstrated compressor and turbine temperatures.
[10] In 2016, the Adaptive Engine Transition Program (AETP) was launched with the goal of developing and testing adaptive engines for the future sixth generation fighter programs, Penetrating Counter Air (PCA) or Next Generation Air Dominance (NGAD) for USAF and F/A-XX for US Navy, as well as potential re-engining of the F-35.