A union representing Boeing engineers and technical workers has filed unfair labor practice charges with the National Labor Relations Board accusing the company of stifling discussion at its plants.

The News Tribune (http://is.gd/chIyHK) reports the union, the Society of Professional Engineering Employees in Aerospace, claims the company told employees they were banned from making negative comments about Boeing.

The union said Boeing company representatives made those remarks at an employee orientation meeting last week.

The charges were filed as Boeing and SPEEA are negotiating for a new contract. Their present contract expires Oct. 6.

Boeing spokesman Tim Healy says the company has not yet seen the complaint and can't comment on its specifics. He says Boeing doesn't prohibit its employees from voicing their own opinions about the company.

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Information from: The News Tribune, http://www.thenewstribune.com