Emergency crews were summoned to the plant about 7:15 p.m. for a report of someone being trapped in a machine, officials said.
Crews freed the man from the machine and transported him to Paine Field.
He was taken from there by helicopter to Harborview Medical Center in Seattle.
He was released from the hospital Thursday morning, a Boeing spokesman said.
The incident happened at the Everett 40-56 building.
No further details will be released, according to a Boeing statement.
"We are deeply concerned any time one of our employees is injured," it read. "We take very seriously the safety and well being of our employees at all times, and will thoroughly investigate the circumstances surrounding this incident."
More Local News Headlines
Objection delays release of records in school shootings Victims’ families want full account of shootings, lawyer says 5:28 p.m. ‘Unprecedented’ wind storm: 23K in county still without power 6:39 p.m. Cost overruns, location, parking needs put courthouse on hold Clarence Robertson volunteered for 56 years as a reserve deputy 5-story building in Mill Creek would include affordable housing Island County undersheriff resigning to care for his children Front Porch: Light a candle for a loved one
Our new comment system is not supported in IE 7. Please upgrade your browser here.