A federal judge in California has enforced a $6.5 million judgment imposed by a Chinese court on an American aircraft manufacturer following a deadly crash of one of the company’s helicopters in the Yangtze River.

The ruling, handed down last week by U.S. District Court Judge Florence-Marie Cooper, is a turning point in a long legal saga pitting two Chinese companies that owned the helicopter, Hubei Gexhouba Sanlian Industrial and Hubei Pinghu Cruise, against its manufacturer, Robinson Helicopter of Torrance, Calif.