Northwest Airlines wants to replace 30 percent of flight attendants on its international flights with non-U.S. flight attendants, roughly 800 people, to cut costs so that it can emerge from bankruptcy, a company executive testified in a New York bankruptcy court Thursday.

Northwest, which filed for Chapter 11 bankruptcy protection in September, seeks to save $1.4 billion in wage and benefit costs. Thursday was the seventh day of hearings devoted to the airline’s request to toss out collective bargaining agreements with the unions.