Here's the NLRB's complaint against Boeing, filed in April [PDF]. Boeing has argued that it did not make the decision to open the plant in South Carolina out of retaliation against unionized employees. The company has also argued that the workers in Seattle weren't adversely affected by the opening of the South Carolina factory because no jobs in Seattle were lost. What's happening now An administrative law judge will have to decide whether the NLRB's lawsuit against Boeing has merit. That hearing began Tuesday in Seattle.