Boeing's top attorney has fired off a scathing letter to the government lawyer who is suing to move the company's 787 assembly line from North Charleston to Washington state over alleged labor law violations.

J. Michael Luttig, executive vice president and general counsel for the aerospace giant, demanded that National Labor Relations Board acting general counsel Lafe E. Solomon withdraw his lawsuit, which has attracted national attention.

In a six-page letter dated Tuesday, Luttig lashed out at Solomon, saying parts of his April 20 lawsuit and some public statements Solomon has made about Boeing are inaccurate.

The NLRB lawsuit stemmed from a complaint filed in March 2010 by the International Association of Machinists and Aerospace Workers, which has engaged in five strikes against Boeing between 1977 and 2008.

Solomon's agency said its investigation found that the company elected in 2009 to "transfer" some of its 787 production to a nonunion site at Charleston International Airport partly to punish the union.

Luttig denied that was the case, saying the company built a new plant from scratch and did not "transfer" any existing manufacturing work away from the Pacific Northwest. He also said Boeing considered multiple business factors in setting up the new $750 million line, including the risk and potential costs of future strikes.

He also said that Solomon, in "repeated statements" to Boeing, agreed not to take any action in the matter if the company agreed not to lay off any 787 workers in the Seattle area. The labor agency has "abandoned the agreement," the Boeing lawyer wrote.

The company plans to build seven Dreamliners a month at its main manufacturing hub in Everett, Wash. The North Charleston line, which is set to open this summer, is designed to produce three 787s a month.

The Post and Courier is seeking comment to the letter from the NLRB.

For more details, see Thursday's editions of The Post and Courier.