In a decision that jeopardizes the Cape Wind project, a federal appeals court in Washington has ruled that the Federal Aviation Administration underestimated the danger the wind farm's turbines would pose to planes flying over Nantucket Sound. A 2009 report by the FAA found that Cape Wind's 440-foot turbines were "no hazard" to planes flying without the aid of instruments. The report was a key factor in the U.S. Department of the Interior's decision to grant final approval to the project earlier this year. Cape Wind, which would have been the first offshore wind project in the United States and could power as many as 420,000 homes in Massachusetts, has faced a series of legal challenges since it was introduced in 2001. The court's ruling could jeopardize the project's lease on its proposed building site, a 24-square-mile section of ocean between Cape Cod and Nantucket.
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