Boeing 777X test aircraft [Courtesy: AirlineGeeks/William Derrickson]
Key Takeaways:
Boeing has reactivated its fourth 777X testbed aircraft (WH004), returning it to flight operations for the first time since late 2021.
This reactivation means all four 777X test airplanes are now concurrently active, a milestone not achieved since 2021.
WH004 is uniquely configured with a full passenger interior to conduct cabin-specific evaluations, such as environmental control and interior noise levels.
The move is part of Boeing's increased efforts to ramp up 777X flight testing ahead of FAA certification, with over 1,400 flights and nearly 4,000 hours completed towards a targeted 2026 first delivery.
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.
