The union violated its duty to bargain in good faith by engaging in regressive bargaining, surface bargaining, misrepresenting deal terms and negotiation status to its members and the public, and failing to bring representatives to the bargaining table with the authority to reach an agreement,

Boeing said late on Thursday it had filed an unfair labor practice charge with the National Labor Relations Board against the union representing its striking U.S. West Coast factory workers, accusing the leaders of not bargaining in good faith.