The vote was 64% in opposition to the deal, which offered a 35% rise in wages over four years.
Striking machinists voted to reject an agreement that would have boosted wages by 35%.
Boeing had already imposed rolling temporary furloughs, but Ortberg said those will be suspended because of the impending layof
Third-shift workers walked out of Boeing's giant factories at Renton and Everett, Washington, as their contract expired ear