Boeing is confronting the consequences of prolonged certification delays on its 777X program, with CEO Kelly Ortberg confirming that roughly 30 completed 777-9 aircraft will undergo significant modifications before they can be delivered to airlines.
The disclosure came during the manufacturer's first-quarter 2026 earnings call in late April. Ortberg told investors that the company has established a dedicated team to manage what Boeing terms 'change incorporation' on these airframes, which have been stored at Paine Field near its Everett, Washington facility. Some of the aircraft were built as early as the original 2020 service-entry target date.
'It depends on when the airplane was built,' Ortberg explained, noting that older examples will require more substantial structural-related changes. The entire effort is expected to span several years, adding another layer of complexity and expense to a development program that has already incurred billions of dollars in charges.
Specialist aviation outlets reporting on the earnings call described the rework as extensive. Updates will address design revisions stemming from certification testing, productivity enhancements, process improvements and other findings that have emerged since the airframes were originally assembled. This situation arose because Boeing continued building aircraft to gain manufacturing experience while the design evolved under intense regulatory scrutiny.
The 777-9, the lead variant of the 777X family, has faced repeated setbacks. First customer deliveries slipped to 2027, seven years later than initially planned. Progress continues on certification, with the FAA recently approving the Type Inspection Authorization 4A phase of flight testing. Boeing also continues to work with GE Aerospace on a durability fix for the GE9X engine's mid-seal, though both companies insist this will not further delay the schedule.
Launch customer Lufthansa still expects to receive its first 777-9 next year, according to recent statements from its own executives. However, the need to modify nearly three dozen completed aircraft raises questions about inventory management, component obsolescence and the eventual hand-over condition of jets that may be several years old by delivery.
Aviation analysts note that storing widebody aircraft for extended periods introduces additional challenges, including preservation requirements and the need to synchronize modifications with latest production standards. The dedicated change incorporation team will likely prioritize airframes based on build dates and customer delivery slots.
For Boeing, the 777X represents a critical program to replace aging 777 and 747 fleets with a more efficient twin-engine widebody featuring folding wingtips and composite construction. The company continues to emphasize steady progress on certification and production system readiness, with plans to increase output rates in the coming years.
The latest revelation arrives as Boeing works to restore confidence following multiple safety and quality issues across its commercial aircraft lines. Under Ortberg's leadership, the focus remains on executing the certification plan communicated to customers while managing the financial and operational burden of the stored fleet.
Industry observers will watch closely how the modification timeline intersects with the 2027 delivery target. While no immediate operational impact exists for airlines, the rework highlights the steep costs of development delays in modern commercial aviation programs.