General Electric GE9X

For the similarly-named engine which powers the Boeing 787 and 747-8, see General Electric GEnx.

GE9X
GE9X installed on the 777X during roll-out in March 2019
Type Turbofan
National origin United States
Manufacturer GE Aerospace
First run April 2016
Major applications Boeing 777X
Developed from General Electric GE90, General Electric GEnx

The General Electric GE9X is a high-bypass turbofan developed by GE Aerospace exclusively for the Boeing 777X. It first ran on the ground in April 2016 and first flew on March 13, 2018; it powered the 777-9's maiden flight in early 2020. It received its Federal Aviation Administration (FAA) type certificate on September 25, 2020. Derived from the General Electric GE90 with a larger fan, advanced materials like ceramic matrix composites (CMCs), and higher bypass and compression ratios, it was designed to improve fuel efficiency by 10% compared to the GE90. It is rated at 110,000 lbf (490 kN) of thrust, which is 5,000 lbf (20 kN) less than the GE90 highest thrust variant, the GE90-115, rated at 115,000 lbf (510 kN).