{"id":105965,"date":"2021-02-07T21:50:49","date_gmt":"2021-02-07T21:50:49","guid":{"rendered":"https:\/?p=105965"},"modified":"2021-02-07T21:59:09","modified_gmt":"2021-02-07T21:59:09","slug":"boeing-777x-performs-extreme-cold-tests-in-alaska","status":"publish","type":"post","link":"https:\/\/aviacionaldia.com\/en\/2021\/02\/boeing-777x-performs-extreme-cold-tests-in-alaska.html","title":{"rendered":"Boeing 777X performs extreme cold tests in Alaska."},"content":{"rendered":"\n

One of four Boeing 777X<\/strong> test aircraft has been flown from Seattle to Fairbanks, Alaska, for testing in extreme cold conditions as part of its certification program.<\/p>\n\n\n\n

Aircraft need to be tested to examine how extreme cold affects various parts of the aircraft.<\/p>\n\n\n\n

See also: <\/em><\/strong>Boeing to delay 777X again as it posts record annual loss.<\/em><\/a><\/p>\n\n\n\n

For example, metals shrink at different rates, while lubricants can lose their viscosity, creating wear problems in moving parts.<\/p>\n\n\n\n

One of the tests involves shutting down the aircraft for 24 hours and then performing a cold start.<\/p>\n\n\n\n

See also: <\/em><\/strong>Emirates considers switching one-third of 777X orders to 787s.<\/em><\/a><\/p>\n\n\n\n

The scope of the tests includes: engine and APU startup after cold dive; thrust reverser testing in snow; verification of systems behavior at extreme temperatures; and aborted takeoff.<\/p>\n\n\n\n

Last week, Boeing announced the delay of the 777X program to accommodate certification changes and customer requests to delay deliveries due to COVID.<\/p>\n\n\n\n

The aircraft has been ordered by airlines including Emirates, Qatar Airways, Etihad Airways, Lufthansa, Singapore Airlines, Cathay Pacific Airways, British Airways and All Nippon Airlines.<\/p>\n\n\n\n

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Look closely. There\u2019s a big \u2018ol plane out there. @Fly_Fairbanks<\/a> #777x<\/a> #flighttest<\/a> @Boeing<\/a> @b777xlovers<\/a> pic.twitter.com\/Vbe1iZE3rS<\/a><\/p>— Paul Weatherman (@paulweatherman) February 7, 2021<\/a><\/blockquote>