The single-engine program that is delaying new Airbus A320neo & Boeing 737 MAX deliveries worldwide sits at CFM International, the joint owner of GE Aerospace and Safran. Its LEAP engine family has become the default powerplant for the world's most popular narrowbody aircraft, including the Airbus A320neo and Boeing 737 MAX.
In a global aviation system built on scale, frequency, and efficiency, CFM's dominance has elevated one engine program into a systemic linchpin. The numbers tell the story: CFM is targeting more than 2,000 LEAP engine deliveries in 2026, a record that reflects surging airline demand and unprecedented backlogs at aircraft manufacturers.
However, even as production ramps up, the industry is running into hard physical limits. A 16% drop in Airbus deliveries in Q1 2026, delays to a $175 million forging press, and ongoing component shortages all point to the same conclusion: engine production, not aircraft assembly, is now the primary constraint on global aviation growth.
Narrowbody aircraft dominate global aviation, accounting for roughly 70% of all commercial aircraft in service. These jets are optimized for short- and medium-haul routes, making them the backbone of airline networks and the primary driver of passenger volumes worldwide.
The LEAP engine, produced by CFM International, has become the default choice within this segment. It powers both the Airbus A320neo family (LEAP-1A) and the Boeing 737 MAX (LEAP-1B), giving CFM a rare dual-platform advantage.
This positioning allows it to capture demand regardless of which manufacturer wins an order. As such, the company is effectively embedded at the center of global aircraft production.
The engine's appeal lies in performance: LEAP delivers approximately up to 15% better fuel efficiency than previous-generation engines, alongside lower emissions and improved operating economics.
Key considerations like fuel can account for 20–30% of airline operating costs. This dominance has translated into market share, with LEAP capturing an estimated 60–70% of new narrowbody engine selections.
The resulting feedback loop strengthens demand further, making CFM's production rate not just important but effectively synonymous with the industry's ability to deliver new aircraft.
Engine manufacturers must balance production and component supply to meet growing demand.
