Boeing Lags Behind on 777X Certification Schedule

More delays sit on the horizon amid ‘mountain of work’ left to complete.

Caleb Revill

Saturday, September 13, 2025 at 10:00 AM ET

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Edited By:

Travis Tingle

Boeing's 777X [Credit: Boeing/Paul Weatherman]

Key Takeaways:

Boeing is falling further behind schedule for the 777X aircraft's certification, potentially pushing its first delivery beyond 2026 and incurring greater financial losses for the already delayed program.
While test flights haven't revealed new technical problems with the jet, a "mountain of work" remains for certification, with recent brake tests taking more than double the expected time.
These certification delays are not limited to the 777X, as Boeing also faces holdups for its 737 Max 7 and 737 Max 10 models, even as the FAA plans to streamline its certification process.

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Boeing is falling behind its schedule to certify the 777X aircraft with regulators next year, a delay that could further push back a program already six years late.

Speaking at a Morgan Stanley conference on Thursday, Boeing CEO Kelly Ortberg confirmed the new widebody jet’s certification is taking longer than expected, though he noted that test flights have not revealed any new technical problems with the jet or its engines.