Boeing will lay off more than 2,500 workers in the U.S. states of Washington, Oregon, South Carolina and Missouri, according to federally required filings posted on Monday and a union official, as part of the debt-heavy U.

In filings made Monday, Boeing said it would be laying off more than 2,000 workers in Washington and Oregon amid a year of strikes and safety issues.

Boeing has so far laid off 2,199 workers in Washington, among job cuts that will eventually total about 17,000 across the company.