With clearance to fly the 737 MAX being delayed once again, Boeing announced it will temporarily suspend production of the aircraft beginning next month. Bloomberg writes that it’s “a move that will deepen the crisis engulfing the planemaker, complicate its eventual recovery…” The news sent Boeing stock down more than 4% Monday afternoon.

The Wall Street Journal reports:

Boeing’s decision to halt production of the 737 MAX is likely to reverberate throughout the U.S. economy. The plane maker is the nation’s largest manufacturing exporter and one of the top private employers.

The company employs around 12,000 workers at its 737 assembly plant in Renton, Wa. Production of the 737 MAX also supports thousands of jobs across the network of over 600 suppliers and hundreds of other smaller firms in the global MAX supply chain.

In a statement, Boeing writes, “We believe this decision is least disruptive to maintaining long-term production system and supply chain health. This decision is driven by a number of factors, including the extension of certification into 2020, the uncertainty about the timing and conditions of return to service and global training approvals, and the importance of ensuring that we can prioritize the delivery of stored aircraft.”

Boeing says there will be “no layoffs or furlough expected at this time,” instead, workers will be reassigned.