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Boeing is certifying the 777X under the Changed Product Rule, the same process used for the MAX. Certification is being pursued as a derivative of the 777, a point of scrutiny on the MAX. Boeing lowered the 777X backlog to just 191 jets in a regulatory filing, far fewer than the 309 firm orders listed on its website. The drop is due to an accounting standard that requires sales at. The new Boeing 777X will be the world’s largest and most efficient twin-engine jet, unmatched in every aspect of performance. With new breakthroughs in aerodynamics and engines, the 777X will deliver 10 percent lower fuel use and emissions and 10 percent lower operating costs than the competition. 1 day ago  Boeing 777X Aircraft Ferried To Alaksa For Cold Soak Testing - Simple Flying -. A Boeing 777X test aircraft has been ferried to Fairbanks, Alaska, to undergo cold soak testing. This week’s move is part of the type’s preparation. Boeing and Airbus often come out with new variants of their plane models. What’s more, Boeing isn’t ceding ground in the wide-body arena. The new Boeing 777X completed its first flight in January.

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A Boeing 777X test aircraft has been ferried to Fairbanks, Alaska, to undergo cold soak testing. This week’s move is part of the type’s preparation program ahead of its introduction in 2023.

The aircraft is one of four 777X test aircraft that Boeing has been preparing with. Photo: Getty Images

Extreme conditions

According to Airline Ratings, the unit currently holds registration number N779XZ. It was ferried from Seattle to the Alaskan city to perform a series of tests. These experiments include the monitoring of how significant cold conditions can impact different parts of the plane. Therefore, Alaska is the perfect location at this time of year.

According to RadarBox, the aircraft left Boeing Field King County International at 12:37 PST to arrive at Fairbanks International at 15:22 AKST on February 4th. Photo: RadarBox

There are several factors to consider with this aspect of testing. For example, metals contract at different durations. Moreover, lubricants may expend their viscosity, which can create wear problems for moving parts. Plastic and rubber materials could also become brittle. The trial involves shutting down the plane for 24 hours before actioning a cold start.

Testing includes the following factors:


Validation of systems behaviors at considerably high temperatures
Rejected take-offs
Engine and auxiliary power unit (APU) start after the cold soak
Thrust-reverser tests with snowy conditions

Cold weather testing plays an important part in the program. Photo: Getty Images

Change of plan

This move follows important developments regarding the 777X program earlier this month. The manufacturer reduced its number of firm orders of the type by 118 units. This has left a total of 191 firm orders for highly-anticipated aircraft.

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In the same week, reports emerged that Emirates, the 777X’s largest customer has been mulling over the prospects of switching some of its orders for the widebody to the smaller 787. The Middle Eastern powerhouse could swap out up to 45 units in favor of the Dreamliner. Overall, these reports emerge following the announcement that the first 777X won’t be delivered until 2023.

There has been plenty of excitement with the Boeing 777X’s launch. Photo: Getty Images

Still focused

Boeing 777x News

Altogether, there have been complications for Boeing across the board over the last year amid the 737 MAX saga and the pandemic. However, despite struggles across the industry and a delay to the 777X’s entry to service, the company is still determined to crack on with crucial testing procedures such as this one in Alaska.

The fourth 777X test unit had hit the air for the first time in September. The quartet will prove vital for Boeing as it seeks to commit to its new introduction date.

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Simple Flying reached out to Boeing for further details on this 777X cold soak in Alaska. We will update the article with any additional information from the company.

What are your thoughts about this Boeing 777X ferrying to Fairbanks in Alaska for cold soak testing? Are you glad to see further progress in the aircraft’s testing procedures? Let us know what you think of the move in the comment section.

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