Boeing Rolls Out First 737 MAX 10 From New Everett North Line, Ending Staggered Builds Forced by Renton Layout
Why It MattersA second 737 final-assembly site that handles the longest MAX fuselage without staggered builds adds capacity once certified, yet wing subassembly shortages still cap narrowbody output and delivery timing.
Boeing rolled the first 737 MAX 10 out of its new North Line at the Everett facility on October 26. The aircraft is destined for launch customer WestJet and is the first 737 variant assembled outside Boeing's Renton plant since 1970.
At 143 feet, 8 inches (43.8 meters), the MAX 10 is 14 feet, 2 inches (4.3 m) longer than the 129-foot, 6-inch (39.5-meter) MAX 8. At Renton, which has roughly 1.1 million sq ft (102,000 m²) of floor space and three active assembly lines, the longer fuselage intrudes into overhead crane pathways and adjacent stations, so Boeing had to stagger MAX 10 builds between shorter MAX 7 or MAX 8 airframes.
Boeing began a $1 billion project to set up the 737 MAX North Line in Building 40-22 at Everett, space vacated after 787 assembly was consolidated in South Carolina. The line offers about 20% more usable floor area per station than Renton, allowing nose-to-tail flow. It started with roughly 1,000 employees, about half reassigned from Renton, and is expected to raise total 737 manufacturing capacity by 25% across Boeing's Puget Sound network.
The FAA granted amended type certification for the MAX 10 on October 20, 2026. Before WestJet or any other customer can take delivery of an Everett-built aircraft, Boeing must obtain a separate amendment to its FAA Production Certificate, so initial deliveries remain paused. During the early low-rate phase, the North Line is moving airframes through stations deliberately slowly.
Wing subassembly shortages remain the main constraint on narrowbody output. Boeing now expects to reach and hold 47 aircraft per month in 2027, before pushing toward 52 per month later that year. Boeing lists 1,555 firm MAX 10 orders, about 31% of the 737 MAX backlog, from customers including United Airlines, Delta Air Lines, WestJet, Ryanair and Lufthansa. The MAX 10 seats 185 to 210 passengers in two classes (maximum 230) and has a range of 3,100 nautical miles (5,740 km).
