February 23, 2024

Airframes bound for Boeing’s 737 Max production facility await shipment on a rail siding at top supplier Spirit AeroSystems Holdings Inc in Wichita, Kansas, U.S., on December 17, 2019.

Nick Oxford | Reuters

Boeing supplier Spirit Aerosystems A Wichita factory shut down Thursday after workers voted against a new labor agreement and backed a strike. Spirit builds the fuselage for the Boeing 737 Max and makes parts for other aerospace manufacturers, including Airbus.

“In light of today’s decision to strike by Spirit AeroSystems employees represented by the International Machinists and Aerospace Workers Union, Spirit will suspend factory production until the contract expires,” Spirit said.

The shutdown began on the first shift on Thursday, two days before workers’ contracts expire.

The union had no immediate comment.

Spirit shares were down about 8% in premarket trading, while Boeing shares were down nearly 3%.

“We will continue to monitor the situation and support our valued suppliers,” Boeing said in a statement.