Bankrupt Northwest Airlines (NWAC) plans to lay off about 1,400 flight attendants, the union representing the workers said Wednesday.

The Professional Flight Attendants Association (search) said in a posting on its Web site that the No. 4 U.S. carrier has said it plans two rounds of flight attendant furloughs.

The first round will affect 900 flight attendants starting Oct. 31, the union said. A second round of about 500 furloughs is set for January.

The PFAA represents about 8,500 flight attendants at Northwest. The carrier's collective bargaining agreement with the workers requires it to offer voluntary furloughs before implementing involuntary layoffs.

The Eagan, Minn.-based airline, which filed for Chapter 11 protection (search) from creditors on Sept. 14, has said it needs $1.1 billion in average annual labor savings and that it may need to raise that target.