Boeing Moves to Establish First Narrowbody Assembly Line at Everett Factory
Historic Production Shift Signals New Era for 737 MAX Program
Everett, United States — Boeing has initiated recruitment efforts for manufacturing managers to staff a new 737 assembly line at its sprawling Everett facility, marking the first time in the factory’s 58-year history that narrowbody aircraft will roll off its production floor. The development represents a fundamental restructuring of how the aerospace giant allocates single-aisle manufacturing across its Pacific Northwest industrial footprint.
Job postings published this month reveal that the new “North Line” will occupy space formerly dedicated to the iconic 747 jumbo jet program, which concluded in 2023. Personnel assigned to the facility will initially train at Boeing’s established Renton plant before transitioning to Everett operations.
The strategic rationale centers squarely on the 737 MAX 10, the largest and most technically complex variant in Boeing’s narrowbody family. This stretched model features unique engineering modifications, including an extendable landing gear system designed to prevent tail strikes during ground operations. These distinctive characteristics demand a slower production cadence than its smaller siblings.
“The dash 10 has the most complexity from all the other variants, so it will naturally flow through the factory at a slower pace,” Boeing Chief Executive Kelly Ortberg explained during the company’s second-quarter 2025 earnings presentation. “Clearing the 737 MAX 10 to a separate line in Everett will allow us to keep the other three MAX production lines in Renton moving smoothly and expeditiously.”
However, the MAX 10 remains grounded by regulatory uncertainty. The aircraft has yet to secure Federal Aviation Administration certification, a process that has stretched years beyond original projections. The delay stems largely from intensified oversight following the fatal accidents involving MAX 8 aircraft in 2018 and 2019, which claimed 346 lives and triggered a global grounding of the entire MAX fleet.
To navigate this certification limbo, Boeing plans to activate the Everett line initially using already-approved variants—the MAX 8 and MAX 9. This approach allows the manufacturer to validate tooling, establish workforce competencies, and refine assembly processes while awaiting regulatory clearance for the larger model. Industry analysts view the strategy as a calculated method to compress the transition timeline from certification to full-rate production once the MAX 10 finally receives approval.
The certification pathway has shown recent progress. In December, the FAA announced it had begun formal review of Boeing’s redesigned crew alerting system, addressing Congressional mandates enacted after the MAX crashes. The agency also approved the MAX 10 to advance into the second phase of flight testing, permitting expanded evaluation of avionics, propulsion systems, and overall aircraft performance.
Yet significant hurdles persist. An unresolved engine anti-icing issue continues to complicate approval efforts. When activated for extended periods in dry air conditions, the system can cause thermal degradation of the engine inlet inner barrel, potentially posing safety hazards. This problem affects all MAX variants, not merely the stretched models awaiting certification.
FAA Administrator Bryan Bedford recently emphasized that the agency is not impeding progress. “We can only help get them there, but they have got to do the work, and they’re doing the work,” he stated following remarks in Washington. “I don’t think FAA is the roadblock on the 7 and the 10 certification.”
Boeing currently holds more than 1,200 firm orders for the MAX 10, representing billions of dollars in backlogged revenue that cannot be realized until deliveries commence. Major carriers including Alaska Airlines, which recently committed to 105 MAX 10 aircraft, and WestJet, which placed a record order for 60 units, have expressed confidence the type will eventually enter service.
The broader production landscape adds urgency to these preparations. Boeing achieved its FAA-imposed production cap of 38 MAX aircraft monthly in May 2025, and the agency subsequently raised the ceiling to 42 units. The manufacturer aims to eventually reach 47 aircraft per month, with longer-term aspirations potentially targeting 52. Adding the Everett line creates essential capacity headroom for this ambitious ramp-up.
For the Everett facility itself, hosting narrowbody production addresses a practical challenge. With 787 Dreamliner assembly fully consolidated at Charleston, South Carolina, and the 747 program concluded, the enormous structure—covering 98 acres and large enough for 75 American football fields—has seen its tenant programs diminish. The 777 freighter and forthcoming 777X, along with 767 cargo jets and KC-46 military tankers, now must share overhead costs across fewer production lines.
Industry observers expect the North Line to become operational sometime in the second quarter of 2026, though Boeing has not publicly committed to specific timelines. The manufacturer continues conducting flight tests with two MAX 10 aircraft, with the most recent evaluation occurring in mid-December.
What remains uncertain is whether Boeing can thread the needle between regulatory requirements, supply chain constraints, and competitive pressures from Airbus, whose A321neo family directly competes with the MAX 10 in the large narrowbody segment. The establishment of Everett’s first single-aisle production capability represents Boeing’s calculated bet that demand for its stretched narrowbody will eventually materialize into delivered aircraft—a transition that hinges entirely on regulators granting their final blessing.
This article was produced in accordance with our editorial standards. Aviantics maintains strict editorial independence.
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