Boeing 777X test aircraft [Courtesy: AirlineGeeks/William Derrickson]
Key Takeaways:
Boeing has reactivated its fourth 777X testbed aircraft, WH004, marking its return to flight since late 2021 and bringing all four test airplanes into concurrent operation.
The WH004 aircraft is uniquely configured with a full passenger interior to conduct specialized cabin evaluations, including environmental control and interior noise levels.
This reactivation is part of Boeing's broader strategy to accelerate 777X flight testing and push towards FAA certification, 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 Group President 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.
