The Boeing Machinists union announced a tentative deal Wednesday to build the 737 MAX in Renton, where 737s are currently assembled, and to extend the labor contract for four years. The news came the same day the union said it reached a tentative deal to settle a contentious National Labor Relations Board dispute with the company. If union members vote to approve the agreement, the union would tell the National Labor Relations Board that it has no further grievances with Boeing. The NLRB lawsuit against Boeing alleged the company violated labor laws by opening a new production line for its 787 airplane in South Carolina. The agency claimed Boeing was punishing Washington state workers for past strikes and wanted the company to return the work to Washington. Boeing denied the charges, saying it opened the South Carolina plant for valid economic reasons. Boeing announced the 737 MAX in August. It will have new engines to improve fuel efficiency and compete with the Airbus A320neo.