Boeing is cutting more than 12,000 U.S. jobs through layoffs and buyouts as the coronavirus pandemic seizes the travel industry. And the aircraft maker says more cuts are coming.

Shortly after disclosing the job cuts, Boeing announced today that it has resumed production of the grounded 737 Max jetliner. Two deadly crashes of Max jets pushed Boeing into a financial crisis months before the coronavirus squeezed global air travel to a trickle.

Boeing, one of the nation’s biggest manufacturers, said it will lay off 6,770 U.S. employees this week, and another 5,520 workers are taking buyout offers to leave voluntarily in the coming weeks.

The company had said it would cut 10% of a workforce that numbered about 160,000. A Boeing spokesperson said today’s actions represent the largest number of job cuts, but several thousand additional jobs will be eliminated in the next few months.

Nearly 10,000 of the layoffs and buyouts are concentrated in the Seattle area, home to Boeing’s commercial-airplanes business. The company previously announced more than 600 jobs cuts in Canada and Australia.

Chicago-based Boeing has reduced production rates on several airplane models in response to falling demand. The company’s defense and space division has remained relatively stable, helping offset the decline in air travel and demand for passenger jets.

Air travel within the U.S. tumbled 96% by mid-April, to fewer than 100,000 people on some days. It has recovered slightly. The Transportation Security Administration said it screened 264,843 people at airports on Tuesday, a drop of 89% compared with the same Tuesday a year ago.

“The COVID-19 pandemic’s devastating impact on the airline industry means a deep cut in the number of commercial jets and services our customers will need over the next few years, which in turn means fewer jobs on our lines and in our offices,” CEO David Calhoun said today in a memo to employees.

Calhoun said the company faces the challenges of keeping employees safe and working with suppliers and airlines “to assure the traveling public that it can fly safe from infection.”

Calhoun warned that Boeing will have to adjust business plans constantly because the pandemic makes it hard to predict the impact on the company’s business.

Union representatives said they were still seeking details of the layoffs. About 1,300 members of the Society of Professional Engineering Employees in Aerospace, which represents Boeing engineers, had been approved for severance packages, including one week of pay for every year of employment, up to 26, according to the union.

“This is an extremely tough time for anyone working in aerospace, and certainly at Boeing,” said Bill Dugovich, a union spokesman. The union has been running webinars to explain Boeing’s severance program and how to apply for unemployment, he said.

Boeing’s crisis began with two crashes of its 737 Max, which killed 346 people and led regulators around the world to ground the jetliner in March 2019. Company engineers have been working for more than a year and a half to fix flight-control software that played a role in the crashes, pushing the planes’ noses down repeatedly.

Federal regulators have not yet approved Boeing’s fixes, but today, the company said workers at a factory in Renton, Wash., started assembling Max jets “at a low rate” under procedures designed to prevent spreading coronavirus. Boeing executives expect to resume deliveries of the plane before October, which will give the company some much-needed cash.

The company’s problems have deepened with the coronavirus, which has cut global air traffic by up to 90% and caused airlines to postpone or cancel orders and deliveries for new planes.

Boeing is a leading U.S. exporter whose importance to the U.S. economy has been highlighted by President Donald Trump. For many years, Boeing was the largest private employer in Washington state — even after the corporate headquarters moved from Seattle to Chicago in 2001 — and it continues to have an outsized impact on the state’s economy.

Washington state was one of the first COVID-19 hot spots in the U.S. and has suffered more than 1,000 deaths from the disease, according to numbers from Johns Hopkins University. Boeing temporarily shuttered jet-assembly plants in March after dozens of workers contracted the virus.

Boeing Co. suppliers such as Spirit AeroSystems have already cut thousands of jobs.