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Boeing's Biggest 737 Is Finally Cleared to Fly. The Hard Part Starts Now.

Nine years after its Paris Air Show debut, the FAA certified Boeing's 737 MAX 10 — a plane carrying 1,555 unfilled orders and nearly a third of the entire MAX backlog. Certification was the milestone. Delivering is the business.

Alpha One

21 Oct 2026 • 6 min read

On Tuesday afternoon in Everett, Washington, the Federal Aviation Administration handed Boeing something it has been chasing for nearly a decade: a type certificate for the 737 MAX 10, the largest member of the MAX family and the plane Boeing needs to fight Airbus in the most lucrative segment of commercial aviation.

The approval ends one of the longest certification sagas in modern aviation history. The MAX 10 was introduced at the Paris Air Show in 2017 and has spent the years since in regulatory limbo while the company lurched through the worst crisis in its 110-year existence — and the backlog kept growing. More than 30 customers have ordered 1,555 MAX 10s that Boeing has yet to deliver, representing more than 30 percent of the entire 737 MAX order book still waiting to be filled.

Certification is the milestone. Delivering those 1,555 airplanes is the business. And that part starts now.

Nine Years, Two Crashes, and a Blown Door Plug

To understand why a stretched variant of a 60-year-old airframe took nine years to certify, you have to understand what happened to Boeing in between.

The MAX 10 was conceived as a straightforward answer to the Airbus A321neo — a longer fuselage, more seats, better per-seat economics. Then two MAX 8 crashes, in Indonesia in 2018 and Ethiopia in 2019, killed 346 people and grounded the global MAX fleet for 20 months. Congress responded with the Aircraft Certification, Safety, and Accountability Act of 2020, which rewrote how the FAA certifies new aircraft and ended the era of Boeing effectively grading its own homework.

The MAX 10 became the first commercial airplane certified under the full weight of that law, according to Boeing — enhanced documentation of safety assessments, human-factors evaluations, and a far more adversarial FAA. Then, just as the program was regaining momentum, a fuselage panel blew off an Alaska Airlines MAX 9 in midair in January 2024, triggering a fresh round of scrutiny of Boeing's factories and a production cap that the FAA has only gradually relaxed over the past 18 months.

The result: a certification campaign that Boeing says ultimately spanned nearly 1,000 test flights, more than 2,000 flight hours, and another 1,000 hours of ground testing. Transportation Secretary Sean Duffy, speaking at Boeing's Everett plant on Tuesday, put it more bluntly: "To think that it took us almost 10 years to get here. We all probably had a little less gray hair 10 years ago."

The MAX 10 also carries an enhanced angle-of-attack system — a direct descendant of the sensor failures implicated in the two fatal crashes — that Boeing says will become standard across the entire MAX family.

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What the MAX 10 Actually Is

The MAX 10 typically seats 185 to 210 passengers in a two-class layout, with a maximum capacity of 230 — up from 160 to 180 on the workhorse MAX 8. Boeing claims the lowest per-seat costs of any single-aisle airplane in service and a range of up to 3,100 nautical miles, with 365 nautical miles more range than competing aircraft flying without auxiliary fuel tanks.

The qualifier matters. The plane the MAX 10 was built to fight, the Airbus A321neo, entered service in 2017 — the same year the MAX 10 was announced — and its longest-range variants can carry more passengers farther. Airbus has spent the intervening nine years converting that head start into market share: the A321neo dominates the large-narrowbody segment, and many of the airlines now waiting on MAX 10s ordered A321neos in the meantime as a hedge.

That is the real cost of the delay. It was never just the engineering hours — it was nine years of conceding the fastest-growing slice of the single-aisle market to the only competitor that matters.

A Third of the Backlog

The commercial stakes are unusually concentrated. Boeing has taken 7,350 orders for the 737 MAX family and delivered nearly 2,500 through the end of September. Of the roughly 4,850 still unfilled, the MAX 10 alone accounts for more than 1,500 — and every one of them has been undeliverable until this week.

The customer list reads like a who's who of the airlines that matter in the narrowbody market: United, Delta, American, and Ryanair are among the major buyers. Alaska Airlines joined in January with an order for 105 MAX 10s plus options for 35 more — a notable vote of confidence from the carrier whose January 2024 MAX 9 door-plug incident set the whole program back.

Deliveries are expected to begin in 2027. For airlines, the arrival is well-timed: a larger plane spreads crew, fuel, and airport costs across more seats at a moment when fuel prices and labor costs have made per-seat economics the industry's obsession. For Boeing, each delivery converts a decade-old IOU into cash flow — the thing the company has been starved of through six years of crisis management.

The Market Shrugged. That's Rational.

Boeing stock closed Tuesday at $190.47, essentially flat on certification day — down half a percent from Monday's close. Zoom out slightly and the move is visible: the shares gained about 3 percent over the past week as certification went from likely to done.

The muted reaction is the correct one. Certification was never the question by October 2026; the FAA cleared the smaller MAX 7 in August, and the MAX 10's approval was understood to be weeks away. What the market is actually pricing is execution risk, and that risk is all in front of Boeing, not behind it. A type certificate means the design meets safety standards. It does not mean Boeing can build 1,555 of them on schedule, to spec, under an FAA production regime that still inspects the company like a parolee. Each individual aircraft must still be cleared before it carries passengers.

The MAX 10 is now simultaneously Boeing's biggest commercial opportunity and its most visible test. The order book is proof that airlines still want the plane nine years late. The delivery ramp will be proof — one way or the other — of whether Boeing's rebuilt production system can actually feed them.

What to Watch

First delivery timing. Boeing says "coming months"; the working expectation is 2027. Slippage here would be the first signal that the production system, not the paperwork, is the binding constraint.
The FAA production cap. The agency has been raising Boeing's allowed 737 output gradually. The MAX 10 ramp is only as fast as that ceiling allows.
Airbus's response. A321neo pricing and delivery slots just got more competitive pressure than they've faced in nine years.
Backlog conversion. Watch whether MAX 10 customers hold their positions or trade down to MAX 8/9 slots to get planes sooner.

Nine years is a long time to wait for a license. The clock that starts today — the one measured in deliveries per month — is the one that will decide whether the wait was worth it.

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