Boeing has started production of the first 737 MAX fuselage stringers at the company’s Fabrication Integrated AeroStructures in Auburn. Stringers run the length of the fuselage structure giving it stability and strength.

After forming, Boeing will send the stringers to Spirit Aerosystems in Wichita, Kan., for incorporation into the first 737 MAX fuselage. From there the fuselage will be shipped to Boeing's Renton facility where Boeing employees will build the 737 MAX. 

The program is on track to begin final assembly of the first 737 MAX next year. The airplane will be part of the flight test fleet and is scheduled to fly in 2016.