Boeing has started production of the first 737 MAX fuselage stringers at Boeing Fabrication Integrated AeroStructures in Auburn, Wash. Stringers run the length of the fuselage structure giving it stability and strength. Pictured here, Joggle Press operator Rich Harrison prepares the first 737 MAX fuselage stringer for the press by brushing on lubricant. The press applies up to 100 tons (90,718 km) of pressure to form small jogs in the metal to engineering design specifications.

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, Wash. facility where Boeing employees will build the 737 MAX. The program is on track to begin final assembly of the first 737 MAX in 2015. The airplane will be part of the flight test fleet and is scheduled to fly in 2016.