Federal Certification Clears Boeing 737-10 Deliveries Against 1,555-Jet Order Book

The Federal Aviation Administration certified Boeing’s 737-10 on Oct. 20, 2026, removing the principal U.S. regulatory barrier between the largest 737 MAX model and customer deliveries. The agency issued an amended type certificate confirming compliance with applicable design and safety requirements, along with an updated production authorization.

That completed certification changes the aircraft’s status from a development program undergoing regulatory review to a product Boeing can deliver to domestic and foreign carriers. It does not establish when the first handover or passenger flight will occur. Boeing expects deliveries to begin in the coming months, while airline schedules point largely toward entry into service during 2027.

A large variant with a large backlog

The 737-10 typically accommodates 185 to 210 passengers in a two-class layout, although Boeing lists a maximum capacity of 230 seats. Its larger cabin is intended to give airlines more capacity than smaller 737 variants without moving to a twin-aisle aircraft. When demand is sufficient to fill the extra seats, that scale can reduce fuel consumption and operating cost per passenger.

Boeing reports 1,555 orders for the 737-10 from more than 30 customers. Those aircraft represent more than 30% of the 737 MAX program’s outstanding order book, making the certification consequential well beyond the first delivery. It allows Boeing to begin converting a substantial portion of its backlog into completed aircraft, but the pace will depend on production stability, supplier performance, customer acceptance and the regulatory approvals applicable in each market.

The order total also shows why certification and production cannot be treated as the same milestone. Approval establishes that the design complies with the relevant requirements and authorizes production; it does not instantly create the manufacturing capacity needed to work through 1,555 orders. Boeing delivered 161 commercial aircraft across its product lines during the third quarter and 475 during the first nine months of 2026, illustrating the industrial scale involved in translating a multiyear backlog into airline fleets.

Certification included updated safety requirements

The FAA said its decision followed years of review and thousands of test-flight hours. Before approval, the agency required the 737-10 to incorporate improvements associated with the 2020 Aircraft Certification, Safety, and Accountability Act and recommendations from the National Transportation Safety Board. These included flight-control updates and an enhanced angle of attack sensor system, which measures information related to an aircraft’s pitch relative to the airflow.

Boeing says the certification campaign included more than 2,000 flight hours, 1,000 ground-test hours and extensive design documentation. The company also identifies the 737-10 as the first commercial aircraft certified to the full extent of the 2020 law, which expanded documentation requirements for safety assessments and human-factors evaluations. Those human-factors provisions are especially relevant because certification must consider how flight crews interact with aircraft systems, indications and procedures not only whether individual components function as designed.

Production is now the controlling constraint

Boeing’s broader 737 production plan remains a practical boundary on the 737-10 rollout. Chief Executive Kelly Ortberg said the company now expects to reach a planned stabilized rate of 47 aircraft per month in early 2027, later than its previous 2026 target, amid continuing supply-chain constraints. That rate covers the wider 737 program rather than the 737-10 alone, so it cannot be translated directly into a delivery schedule for the new variant.

Several airlines are preparing for deliveries in 2027. WestJet is targeting 737-10 entry into service in the first quarter, Ryanair expects aircraft in early 2027, Alaska Airlines anticipates its first delivery in the second quarter, and Delta Air Lines and United Airlines also expect deliveries during the year. These remain customer plans rather than confirmed handover dates, and Boeing has not yet verified a launch operator.

The FAA action therefore closes the aircraft’s central U.S. design-approval phase while opening a different test: repeatable production, aircraft acceptance and dependable entry into airline service. The first confirmed customer handover will mark the point when the 737-10 moves from a certified design into the operating fleet; the subsequent delivery rate will determine how quickly Boeing can address the remaining 1,555-aircraft order book.

By Thomas Caldwell — AMI’s senior editor for mechanical and mobility engineering, covering vehicle electronics, systems integration, electrification, chassis systems, propulsion, and safety policy.