The General Electric GE9X is a high-bypass turbofan aircraft engine developed for the Boeing 777X which is the largest aircraft engine yet developed.
The GE9X is derived from the GE90 engine and General Electrics reportedly invested more than $2 billion for its development. The GE90 engine designed for the Boeing 777 entered service for the first time in 1995. The engine has a thrust rating of 81,000 to 115,000 lbs. (360 to 510 kN).
The engine has received FAA certification on the 25th September marking a major step toward entry-into-service on the Boeing 777-9; the first of the 777X family, in 2022.
GE has delivered Eight GE9X engines, plus two spares, to Boeing including powerplants for the fourth and final 777-9 test aircraft.
The test engines accumulated just under 5,000 hr with 8,000 cycles during the certification program which including test flights.