Unrest in Southwest - Curt Lewis

Southwest pilots sue carrier to block flying of Boeing's Max

Southwest Airlines' pilots' union has sued to block the airliner from flying Boeing Co.'s newest 737 until the plane is negotiated into a new contract for the 8,300 aviators. (Chris Sweda / Chicago Tribune)

Southwest Airlines Co. pilots' union asked a federal court to block the carrier from flying Boeing Co.'s newest 737 until the plane is negotiated into a new contract for the 8,300 aviators.

The union also wants the court to order Southwest to stop "delaying and frustrating bargaining" and fulfill its legal duty to make every effort to reach a contract if the airline wants to fly the 737 Max when it's delivered next year. The Southwest Airlines Pilots Association filed the lawsuit in the federal court in Dallas on Monday.