Boeing CEO Kelly Ortberg announced that flight tests for the 777-9 aircraft may extend into 2027. The delay stems from the GE9X engines, as the required testing scope exceeded initial projections. Specifically, engineers identified durability issues with the intermediate seal, which manages power distribution between turbine stages.
GE Aerospace is currently working to certify a technical fix for the engine component. Until this process concludes, Boeing cannot secure FAA approval for ETOPS certification. This clearance is critical for the 777-9, as it dictates the aircraft's ability to operate on long-haul routes far from diversion airports.
The engine-related complications have forced Boeing to adjust its production schedules and delivery timelines for the 777X family. While the company maintains its official goal of delivering the first aircraft in 2027, the CEO acknowledged that the remaining testing window is narrow.
The 777-9 program has faced repeated setbacks since its maiden flight in January 2020. Technical challenges and certification delays have pushed the commercial debut back by several years, casting doubt on whether the current 2027 target remains achievable.
