China’s newest attack helicopter is powered by Canadian-built engines, a development military analysts say could spark a backlash against Canada’s aerospace industry from U.S. lawmakers concerned about technology being transferred into the wrong hands. Other analysts are questioning why Canada would sell engines to a nation that has used its military to crush internal dissent. The engines built by Pratt and Whitney Canada of Longueuil, Que., are being used to power Z-10 Zhisheng attack helicopters. But Pratt and Whitney says it has done nothing wrong and the sale was approved by the federal government.