Boeing reportedly planning composite wing plant for Wash.

Boeing workers in Washington hope the company will decide to build carbon-fiber composite wings for a bigger 777 in the state.

Mark Blondin of the International Association of Machinists union says a new wing plant would be a giant win for the state.

The Seattle Times reports a manufacturing plan for the 777X is expected to go to the Boeing board by the end of the year. The plane would likely be assembled at the Everett plant where current 777s are put together. A new wing plant would add hundreds of jobs.

The only sizable composite pieces built in Washington now are the 787 tail fin and the 777 tail, which are made at Boeing's Frederickson plant near Tacoma.