From USTR:
United States Trade Representative Ron Kirk announced today that the United States has prevailed in a World Trade Organization (WTO) dispute over claims by the European Union (EU) related to The Boeing Company. ...
“This decision is a tremendous victory for American manufacturers and workers – and demonstrates the Obama Administration’s commitment to ensuring a level playing field for Americans,” Ambassador Kirk said.
From the EU:
The European Commission today welcomes the WTO appeal ruling in the "Boeing case" which confirms that billions of dollars in US subsidies granted to Boeing are illegal under WTO rules. The WTO’s Appellate Body rejected the US appeal and found that US Federal and State governments granted between US$ 5 and 6 billion WTO-incompatible subsidies to Boeing between 1989 and 2006. ...
"Today's ruling vindicates the EU's long-held claims that Boeing has received massive US government hand-outs in the past and continues to do so today", said EU Trade Commissioner Karel De Gucht. ...
In terms of the substance, at first glance it seems that the Appellate Body upheld many of the Panel's findings, but I think that a first glance is probably insufficient here.
