A panel of WTO adjudicators ruled last month that a tax break from Washington state to help U.S. planemaker Boeing (>> Boeing Co) develop its new 777X jetliner was a prohibited subsidy.

Details of the appeal were not immediately available, but Boeing said last month that it was confident that the United States would be able to reverse the ruling.

(Reporting by Tom Miles; editing by Stephanie Nebehay)

Stocks treated in this article : Airbus Group, Boeing Co
Stocks treated in this article : Airbus Group, Boeing Co