The world's next great engine

In more than a century of building engines and powering flight, GE Aviation has never stopped innovating. All those years of research, testing and development will come together to power the new Boeing 777X airplane with the all-new GE9X engine, built on a proven architecture while incorporating the latest technologies and materials.

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Tested for years. Confidence from day one.

With the most extensive technology maturation program in the history of GE Aviation, the GE9X will deliver world-class reliability and performance at service entry. But first, components undergo rigorous testing at specialized facilities around the globe.

Fan blade testing (Seattle, WA)

See how scaled 4th-generation composite fan blades are used to validate the 16-count design – the lowest of any twin-aisle engine available.

Compressor testing (Massa, Italy)

Take a look at how the compressor’s record-breaking 27:1 pressure ratio and new 3D aerodynamics are qualified on a custom-built rig in Massa, Italy.

The most advanced technologies and materials

A blend of evolutionary and revolutionary designs will enable the GE9X be the most fuel-efficient engine GE has ever produced on a per-pounds-of-thrust basis. It’s designed to deliver a 10% improved aircraft fuel burn versus the GE90-115B-powered 777-300ER and a 5% improved specific fuel consumption versus any twin-aisle engine available, plus achieve an approximate 10:1 bypass ratio, a 60:1 overall pressure ratio and margin to Stage 5 noise limits.

  • The largest fan produced by GE
  • New composite fan case
  • 16 fan blades using 4th generation composite carbon fiber
  • 27-to-1 compressor pressure ratio
  • Three-stage booster
  • 11-stage high-pressure compressor with the first five stages being blisks and new 3-D aerodynamics technology in all stages
  • TAPS III combustor with 3rd generation lean burn technology for greater efficiency and low emissions
  • Approximate 30% NOx emissions margin to CAEP/8
  • Ceramic matrix composite (CMC) material in the combustor and high-pressure turbine
  • New powdered alloy material in high-pressure turbine
  • Enhanced titanium aluminide (TiAl) low-pressure turbine airfoils
  • Debris rejection system

World-class reliability, right at service entry

The advanced materials, coatings and aerodynamics in the GE9X will be validated through GE Aviation’s most extensive testing program ever. As part of this commitment to product maturation, the GE9X will benefit from more than 14.5 million ground, flight and in-service cycles of cumulative experience across our engine portfolio, validating design and technology prior to service entry.

The years of testing will provide multiple proof points of the GE9X’s technical and manufacturing readiness from day one.

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GE9X High-pressure
compressor testing

GE9X composite fan blade
and fan rig testing


GE9X ceramic matrix composite
(CMC) demonstration


GE9X first full
core test


GE9X design freeze


GE9X first engine test


GE9X flying test bed


FAR 33 certification

GE9X entry into service (EIS)


Engineered with the environment in mind

The GE9X will be one of GE’s latest ecomaginationSM qualified products. It will feature the same world-class reliability as the GE90-115B, with noise and NOx emissions well below anticipated regulation standards. Environmental performance highlights include:

The quietest engine ever produced by GE*8db margin to Stage 5

The lowest NOx emissions from a GE engine*approximately 30% margin to CAEP 8
*On a per-pounds-of-thrust basis
For more information about GE's ecomagination initiative, go to




Purpose-designed for the Boeing 777X, the GE9X will be the most fuel-efficient engine GE has ever produced.

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