Boeing's Renton Factory Must Stagger The 737 MAX 10 With Smaller Jets, But Everett Can Run Nose-To-Tail

Boeing rolled the first 737 MAX 10 out of its new North Line at the Everett facility on October 26, and the aircraft is destined for launch customer WestJet. It is the first time a 737 variant has been assembled outside Boeing's historic Renton plant since 1970. The 737 MAX 10's fuselage measures 143 feet, 8 inches (43.8 meters), and Renton's compact assembly bays forced Boeing to stagger the elongated airframe between smaller variants like the MAX 8 to prevent structural overlap between adjacent stations. By repurposing space in Everett's massive widebody plant, Boeing has given its largest narrowbody an assembly line tailored to its length.

Boeing's Renton factory covers roughly 1.1 million sq feet (102,000 m²) of total floor space, with three active assembly lines bounded by Lake Washington and local rail lines. A standard 737 MAX 8 measures 129 feet, 6 inches (39.5 meters) long, while the MAX 10 is stretched 14 feet, 2 inches (4.3 m) longer, so its nose and tail sections intrude into overhead crane pathways and the working envelopes of adjacent stations. To avoid costly structural collisions during station transitions, Renton line managers must manually stagger the build sequence so a longer MAX 10 is always preceded and followed by shorter MAX 7 or MAX 8 airframes. The requirement creates scheduling friction across Renton's 12,000-person workforce, and with 1,555 firm orders for the MAX 10, about 31% of the total 737 MAX backlog, Renton's layout threatened to become a permanent operational bottleneck.

Boeing began a $1 billion capital project to establish the 737 MAX North Line inside its flagship Everett facility, occupying high-bay space in Building 40-22 vacated following the consolidation of 787 Dreamliner assembly to South Carolina. The new line provides approximately 20% more usable floor area per station than Renton, so the 737 MAX 10 can move continuously in a true nose-to-tail orientation without staggered buffers. Supported by an initial workforce of roughly 1,000 employees, about half reassigned directly from Renton, the dedicated layout increases total 737 manufacturing capacity by 25% across Boeing's Puget Sound industrial network. Rollout does not mean deliveries are imminent: the Federal Aviation Administration (FAA) granted amended type certification for the 737 MAX 10 flight platform on October 20, 2026, but Boeing must still secure a separate amendment to its FAA Production Certificate, and initial WestJet deliveries will remain paused until it is formally issued.

Boeing leadership confirmed that the main constraint on narrowbody output is an ongoing shortage of wing subassemblies, which are arriving well behind schedule. Boeing revised its master production ramp and now expects to reach and hold 47 aircraft per month in 2027, before attempting a further push toward 52 jets per month later that year. The MAX 10 carries 185 to 210 passengers in a standard two-class layout, with a maximum capacity of 230 seats and a range of 3,100 nautical miles (5,740 km), competing directly with Airbus' A321neo. With firm orders from operators including United Airlines, Delta Air Lines, WestJet and Ryanair, and Lufthansa also opting for the type, Renton can focus its three moving lines on high-volume MAX 8 and MAX 9 builds while Everett takes on the MAX 10.