Boeing 777X test aircraft [Courtesy: AirlineGeeks/William Derrickson]
Key Takeaways:
Boeing has reactivated its fourth 777X testbed aircraft, WH004, marking the first time all four test planes have been concurrently active since 2021.
WH004 is uniquely configured with a full passenger interior to conduct cabin-specific evaluations, supporting the acceleration of 777X flight tests for FAA certification.
The 777X test program has accumulated nearly 4,000 flight hours over 1,400 flights, with the first 777-9 delivery targeted for 2026.
Boeing has reactivated its fourth 777X testbed aircraft, designated WH004, marking its return to flight operations for the first time since late 2021.
The aircraft took off from Paine Field (KPAE) in Everett, Washington, on Wednesday. Following this flight, all four 777X test airplanes are now concurrently active, a milestone not achieved since 2021.
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Ryan is Sr. Director of Digital for Firecrown's Aviation Group. In 2013, he founded AirlineGeeks.com, a leading trade publication covering the airline industry. Since then, his work has been featured in several publications and news outlets, including CNN, WJLA, CNET, and Business Insider. During his time in the airline industry, he's worked in roles pertaining to airport/airline operations while holding a B.S. in Air Transportation Management from Arizona State University along with an MBA. Previously, he worked for a Part 135 operator and later a major airline. Ryan is also an Adjunct Instructor at Embry-Riddle Aeronautical University.
