Boeing Invests $1 Billion in New 737 MAX Assembly Line at Everett to Boost Production

Boeing 737-10 MAX (N27752) - Darryl Morrell - AirTeamImages.com

Boeing has announced a $1 billion investment to establish a new 737 MAX final assembly line at its Everett, Washington, facility, significantly expanding production capacity as the manufacturer works to meet strong global demand and reduce its order backlog.

The new production line, known as the "North Line," will become the fourth active final assembly line for the Boeing 737 MAX program. It is expected to play a key role in Boeing's long-term goal of increasing 737 MAX production to 52 aircraft per month, while also strengthening the resilience and flexibility of its manufacturing operations.

Expanding Production Capacity

Although final assembly will take place in Everett, 737 MAX wings will continue to be built at Boeing's Renton factory before being transported north for integration. Each aircraft is expected to spend approximately 10 days on the new assembly line, where mechanics will carry out major production tasks including:

1. Electrical wiring installation
2. Engine installation
3. Cabin outfitting
4. Systems integration
5. Final inspections and testing

The additional line is designed to complement Boeing's existing production facilities while helping the company address a backlog of more than 4,300 unfilled 737 MAX orders from airlines around the world.

A New Role for the Everett Factory

Boeing's Everett facility—recognized as the largest building in the world by volume—has historically been dedicated to widebody aircraft production, including the 777, 767, and KC-46A Pegasus military tanker.

With the addition of the North Line, Everett will now also play a significant role in the production of Boeing's best-selling narrowbody aircraft. Boeing says the line will initially increase output gradually before reaching full production capacity.

The facility will also have the flexibility to assemble both commercial airline aircraft and specialized VIP variants of the 737 MAX.

Meeting Continued Airline Demand

The investment underscores Boeing's commitment to increasing aircraft deliveries as airlines continue to expand fleets and modernize operations with more fuel-efficient aircraft.

The 737 MAX remains one of the world's most in-demand single-aisle aircraft families, and expanding production capacity is expected to help Boeing shorten delivery times while improving manufacturing resilience.

As global air travel continues to recover and fleet replacement accelerates, the new Everett assembly line represents another major milestone in Boeing's efforts to meet customer demand and strengthen its commercial aircraft production network.