Boeing appears to be making progress in the long road toward certification of its next-generation long-haul jet, the 777X. The latest iteration of the highly successful 777 family has had a turbulent development history, but recent test milestones suggest renewed momentum.
Brakes Under Pressure
In a recently released video, Boeing showcased an intense brake test conducted at Clinton Sherman Airport, closely supervised by the FAA. During the test, the 777X’s braking system was pushed to its operational limits to ensure compliance with stringent safety and performance standards required for certification.
WH001 (N779XW) is at Clinton Sherman Airport for certification brake testing with FAA oversight.
— Boeing 777X (@b777xlovers) March 25, 2025
The 777X brake testing ensures the aircraft's braking system meets safety and performance standards required for FAA certification.#777X #FAA #Boeing777X pic.twitter.com/qPn6XWyuEk
If the aircraft clears the test without issues, it would mark a significant step forward in the certification process. This progress comes after a long pause, with all 777X test aircraft grounded until mid-January 2025. In the months since, Boeing has resumed testing activities at a steadier pace.
Testing in the Tropics
Shortly after returning to flight testing, a 777X touched down in Curaçao in February for tropical climate trials. The island’s 30°C temperatures and 77% humidity provided ideal conditions to assess the aircraft’s reliability and performance in hot and humid environments—an essential step for global operations.
WH002 (N779XX) take-off from Curaçao (CUR) for flight test in island’s hot and humid weather conditions.
— Boeing 777X (@b777xlovers) February 15, 2025
Video @Kélah | #777X #GE9X #Boeing777X pic.twitter.com/nC5ABsoPKd
A Difficult Chapter
Despite the recent progress, the 777X program remains a troubled chapter in Boeing’s portfolio. Originally set for delivery years ago, the aircraft has faced repeated delays due to technical setbacks, development challenges, and increased regulatory scrutiny—particularly in the wake of the 737 MAX and 787 Dreamliner production issues.
The extended timeline has already cost Boeing billions of dollars, not to mention growing reputational damage as airlines—some waiting for years—express frustration over continued delays. Last year, all test aircraft were grounded due to new technical concerns, fueling worries among carriers about the possibility of further postponements.
With critical tests now underway, Boeing is under pressure to deliver results and regain the confidence of regulators and customers alike.