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The 747-8 is owned by Boeing and is being used for flight testing. The number 12 is a salute to the team's fans, collectively known as being the Seahawks “12th man.”
Boeing revealed the jumbo jet’s special paint with the blue and neon green Seahawks logo and a "12" on the tail Wednesday.
Boeing, which manufactures much of its commercial aircraft in the Seattle-area, says there are just the two test pilots on board for the 4-hour-50- minute flight.