According to Reuters journalist Aishwarya Jain, Boeing and General Electric are analyzing a potential engine seal issue on the Boeing 777X’s GE9X powerplant, a development with possible implications for the long-delayed widebody aircraft program.
The issue involves a seal within the GE9X engine, which could affect durability and potentially require a redesign or retrofitting during maintenance overhauls. The report cites Bloomberg News’ sources familiar with the matter and notes that Boeing CEO Kelly Ortberg disclosed the concern during the company’s Q4 earnings call.
While investigators are still gathering data, the companies maintain that current delivery plans for 2027 are unchanged.
What Is Happening With the 777X GE9X Engine?
The GE9X engine, certified by the U.S. Federal Aviation Administration in 2020, is designed to power the Boeing 777X, the next generation of Boeing’s flagship widebody jet.
- The potential issue is linked to a durability concern involving an internal seal.
- Company officials emphasize that it is too early to determine how significant the issue may be.
- Boeing has so far flown only a portion of its 777X test fleet in 2026, signaling ongoing certification hurdles.
Timeline of the 777X Program and Emerging Challenges
- 2013: Boeing launches the 777X program.
- Originally planned entry into service: 2020.
- Repeated delays: Delivery now expected in 2027.
- Past technical setbacks: Structural component issues grounded test aircraft in 2024.
- Current development: Engine seal durability under review (2026).
Why This Matters for Aviation
Impact on Boeing 777X Certification
The 777X, Boeing’s most advanced widebody airliner, has faced repeated delays due in part to structural and certification challenges. Any new issue with the GE9X engine could complicate regulatory approval and airline customer planning, though officials remain optimistic that the existing delivery timeline is feasible.
Industry and Airline Planning
- Airlines that have ordered 777X jets plan fleet modernization around these deliveries.
- Delays ripple into route expansion strategies and long-haul capacity planning.
- Supply chain adjustments are common when powerplant redesigns are required.
What’s Next for the 777X Program
- GE Aerospace and Boeing continue analysis of the seal integrity.
- FAA and other regulators may require supplemental data or testing evidence.
- Airlines awaiting the 777X will monitor for schedule changes and service bulletins.
Sources
- Reuters: Boeing, GE identify potential engine seal issue on 777X
- Bloomberg News: Reporting based on people familiar with the matter regarding GE9X engine durability
- Boeing: Boeing 777X program overview and technical background
