Boeing Starts Fourth 737 MAX Line in Everett to Boost Output
BA•On July 6, 2026, Boeing activated its fourth 737 MAX assembly line at the Everett, Washington plant. The addition increases the company's MAX assembly capacity to four concurrent lines, aimed at supporting delivery growth as airline orders climb.
1. Activation of Fourth Assembly Line
On July 6, 2026, Boeing officially brought its fourth 737 MAX assembly line online at the Everett, Washington facility. Crew assignments shifted to accommodate the new line, marking the first expansion since the third line launch in 2024.
2. Production Capacity and Outlook
With four parallel lines, Boeing can increase weekly output of 737 MAX jets, targeting higher delivery volumes to meet a backlog exceeding 5,000 aircraft. Management expects the ramp to improve revenue visibility and support margin gains through better fixed-cost absorption.
