Just last week, Boeing's fuselage supplier, Spirit AeroSystems Holdings Inc. ( NYSE: SPR ) announced that it would lay off about 2,800 employees at its Kansas plant as a result of Boeing's decision to stop production of the 737 Max with no firm plan for when production may resume. More than 600 Boeing suppliers provide parts for the company's airplanes. In addition to Spirit, the best known is probably General Electric Co. ( NYSE: GE ). GE's aviation segment provides the Leap-1B engine for the 737 Max through a 50/50 joint venture, CFM International, with France's Safran.