Spirit AeroSystems had been scrambling to cut costs after more than 32,000 Boeing machinists walked off the job Sept. 13.

The plane manufacturer said the employees affected by the furloughs were working on Boeing’s 767 and 777 programs.

Spirit AeroSystems will tell employees on Friday that it will furlough 700 workers for 21 days as an over month-long strike at U.S. planemaker Boeing eats into the supplier's cash and inventory space,