Boeing is halting its production lines for two weeks of the H-47 Chinook cargo helicopter and the V-22 Osprey tilt-rotor aircraft to perform a coronavirus deep cleaning at the Ridley plant, writes Jen Hudson for defensenews.com.

“We have had positive test results for Boeing Philadelphia employees, but we are not commenting further on any affected employees to ensure privacy,” Andrew Africk, a Boeing spokesman, told Defense News in an April 3 email.

“This action is intended to ensure the well-being of employees, their families and local communities, and will include an orderly shutdown consistent with requirements of U.S. and global defense customers,” Boeing said in an April 2 statement.

The company stopped work end of day  Friday. Employees will return to work April 20.

Boeing is working “closely” with area government and public health officials, and “we’re also in contact with our customers, suppliers and other stakeholders affected by this temporary suspension as we assist in the national effort to combat the spread of COVID-19,” Steve Parker, Boeing’s vertical lift vice president and general manager, said in the statement.

The company will establish new “rigorous criteria” when employees return to work.

Read more about the Ridley plant shut down here.