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The U.S. Department of Commerce made a preliminary ruling Tuesday that Bombardier Inc. received countervailing subsidies, and will implement a hefty duty of 219.63 per cent on all U.S.-bound CSeries jets.

While the positive determination against Bombardier was largely expected, it is a victory for Boeing Co., which prompted the investigation, and potentially puts the Montreal-based company’s sale of 75 aircraft to Delta Airlines at risk.

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Bombardier stock dropped more than 13 per cent after opening Wednesday.

Bombardier released a statement Tuesday evening saying the company strongly disagreed with the Commerce Department’s preliminary decision, reiterating its position that the U.S. government should “reject Boeing’s attempt to unfairly tilt the playing field in its favour.”

“The magnitude of the proposed duty is absurd and divorced from the reality about the financing of multibillion-dollar aircraft programs,” Bombardier said.