GE Aerospace has quietly stopped shipping GE9X engines to Boeing. The pause traces back to a durability issue the companies flagged earlier this year, and it lands on a program that has already spent years fighting delays. Boeing insists the setback won’t touch the 777-9’s certification timeline, with deliveries still expected to resume before the third quarter closes and customer aircraft, including jets bound for Emirates (EK), still on track for next year.
The Problem with the World’s Biggest Engine
The trouble sits inside a mid-seal component, a part that balances power across the engine’s turbine stages and matters a great deal for how well the GE9X holds up over time. GE Aerospace disclosed the issue months ago, and on Boeing’s second-quarter earnings call on July 28, Chief Financial Officer Jay Malave said the engine maker has now finished its root cause analysis and is confident in the fix. The revised design is already built into GE Aerospace’s production line, and the company is working with the Federal Aviation Administration to get the modification certified. Neither side has said publicly how many engines got caught up in the pause, or exactly when shipments stopped, according to FlightGlobal.
Certification Marches on Regardless
Boeing is drawing a hard line between the engine hiccup and the certification program itself. CEO Kelly Ortberg told investors the flight test campaign is moving at an accelerated clip, with more than 55% of the required testing already behind it. Extended-range Twin-engine Operational Performance Standards (ETOPS) testing, the evaluation that lets twin-engine jets like the 777-9 fly farther from diversion airports, is set to begin later this year. Boeing is still pointing to first customer deliveries in 2027.
Thirty Aircraft, Thousands of Fixes
Certification is only half the picture. Roughly 30 early-build 777-9 jets were assembled before Boeing locked in its final design standard, and each now needs to pass through what the company calls its “change incorporation” process. Ortberg has said the scope of that work differs from aircraft to aircraft, with some needing far more rework than others, and that Boeing is coordinating individually with customers on delivery timing and final configuration. Boeing Commercial Airplanes President and CEO Stephanie Pope framed the rework as a normal part of how a new aircraft design settles during development, not evidence of a new production problem, and said the company doesn’t expect it to trigger fresh financial charges.
Emirates Wants the Finished Aircraft, not a Work in Progress
That reassurance hasn’t stopped Emirates from pushing back. As the 777X family’s largest customer, the airline has made clear it wants jets that already meet the final certified spec, not aircraft that will need retrofitting after the fact. Emirates President Sir Tim Clark has reportedly declined to accept some of the earliest production aircraft for exactly that reason, according to recent industry reporting. It’s a pointed reminder that even Boeing’s biggest 777X buyer is watching the rework program closely before committing to take delivery.
Why This Shouldn’t Cost Boeing Billions More
On the balance sheet, Boeing says there’s little new damage here. The company already absorbed a $4.9 billion charge on the 777-9 program in the third quarter of last year, after it revised its outlook on the certification schedule, and executives say that charge already priced in the cost of reworking early production aircraft. Barring further surprises, Boeing doesn’t expect to book another major charge tied to the current round of modifications.
Where the Program Stands
The GE9X pause adds one more complication to a program that has weathered plenty of them, but Boeing’s message is consistent: none of it moves the finish line. More than half of flight testing is done, ETOPS trials start later this year, engine deliveries are expected back within the current quarter, and 2027 remains the target for first deliveries. What happens over the next few months, as Boeing, GE Aerospace, and the FAA close out the engine fix and the remaining certification work, will determine whether that target holds for what is set to become the largest twin-engine widebody in the sky.