How The GE9X's 134-Inch Fan Creates Problems No Other Jet Engine Faces

The discovery of a crack in the GE9X’s mid-seal during a January 2026 inspection could easily be framed as just another technical hurdle in the long development story of the Boeing 777X. Instead, it reveals something far more interesting about modern aircraft engine design, particularly when engineers attempt to scale performance to unprecedented levels. The GE9X is not just an incremental improvement over its predecessors, but a machine that pushes the physical limits of size, airflow, pressure, and temperature in ways no commercial aircraft engine has before.