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How Lively Have Boeing’s 777X Take a look at Plane Been Within the Final Yr?

Following an inspection final October, Boeing needed to droop flight testing of its latest twin-engined jet after a technical challenge occurred through the GE9X post-certification engineering check. The issue was resolved, and the plane producer resumed flight testing final month, however how energetic have its Boeing 777X check plane been currently as Boeing races to ship by 2025?

An replace on the Boeing 777X’s newest check flights

Boeing at present has 4 check plane for its Boeing 777X program – N779XW, N779XX, N779XY, and N779XZ. Nonetheless, solely half have been actively flying, whereas the opposite two haven’t operated a check flight for over six months.



The primary of the 4 Boeing 777X check plane, N779XW, is primarily used to check electronics, taxi checks, avionics brakes, flutter, icing, stability, management, and low-speed aerodynamics. The plane has been moderately energetic just lately, with check flights carried out practically every day for this month. The newest check flight on the time of writing was on January twenty second, when it flew for 4 hours over Seattle Boeing Subject.

Earlier than that, N779XW was flying twice on January twenty first, with a comparatively brief flight of over one hour within the morning from Seattle Boeing Subject to Moses Lake. Then within the afternoon, the plane took off from Moses Lake and flew for over three hours earlier than touchdown again at Seattle Boeing Subject.


Additionally actively flying is N779XX, which is accountable for testing auto-landing, floor results, stability, and controls. Compared to the primary Boeing 777X prototype, N779XX hasn’t been flying as a lot this month. Though the plane final flew on January twenty second, it was for a mere 9 minutes over Yuma Worldwide Airport and an earlier morning flight that lasted lower than 50 minutes.

The plane additionally flew twice on January twenty first, with the morning flight lasting roughly 48 minutes and the afternoon flight lasting a minute longer. Each check flights additionally came about over Yuma Worldwide Airport. Since N779XX isn’t supposed to check as many variations as N779XW, the plane typically has decrease flight occasions, usually flying for underneath an hour or as much as two hours at most.


The exercise for the check plane will get additional lowered when speaking about N779XY, which checks for the Boeing 777X’s auxiliary energy unit, avionics, flight hundreds, and propulsion efficiency. It is also the one check plane already booked in to go to a future airline operator, German flag service Lufthansa.

N779XY final took off final 12 months on July twelfth, when it flew for practically two hours from Moses Lake to Everett Paine Subject.

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The fourth and closing Boeing 777X prototype, N779XZ, is primarily used to check environmental management programs, prolonged twin-engine operations, noise, normal performance, and reliability.

N779XZ hasn’t flown in additional than a 12 months, with its final check flight occurring on November 18th, 2021. The plane flew for under 18 minutes from Seattle Boeing Subject to Everett Paine Subject however was actively flying virtually every day earlier than that. Nonetheless, the plane is anticipated to start out again within the check program in July this 12 months.

Eager for the beginning of the ultimate certification

In Might 2021, the Federal Aviation Administration (FAA) emphasised it will not certify the Boeing 777X program till mid-to-late 2023. Because of this all 4 Boeing 777X testbeds must be up and test-flying within the coming months to arrange for the Kind Inspection Authorization earlier than the FAA can begin the ultimate certification course of.

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    Date Based:

    Dave Calhoun

    Headquarters Location:
    Chicago, USA

    Key Product Strains:
    Boeing 737, Boeing 747, Boeing 757, Boeing 767, Boeing 777, Boeing 787

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