The LEAP Engine

Performance. Execution. Technology.

Lightweight materials & 3D aerodynamics

Reduced weight, increased efficiency

3-D woven carbon fiber composites

Lower fuel burn
High durability
Corrosion-resistant and lubricant-free

High bypass ratio

Optimum propulsive efficiency

High tech compressor

Optimum thermal efficiency

3-D woven carbon fiber composites

Lightweight increased durability

Debris rejection system

Airfoil protection against erosion

New generation combustor

Lean burn, low temperature

Lightweight materials & 3D aerodynamics

Reduced weight, increased efficiency

Ceramic composites, new cooling & 3D aerodynamics

Reduced weight, cooling optimization

A New Standard in Reliability

Featuring a suite of cutting-edge technologies, the LEAP sets a new standard in reliability and engine performance.

15% fuel improvement

The LEAP delivers a 15% improvement in fuel consumption, compared to today’s best CFM56 engines, and maintains the same level of dispatch reliability and life-cycle maintenance costs.


Leveraging the successes and unrivaled experience of the CFM56 program, the LEAP engine is built for 99.98% dispatch reliability – which means more time in the air and less maintenance time.

Aircraft Applications

LEAP-1A - Airbus A320neo

24,500 – 35,000 pounds thrust (at altitude)

LEAP-1B - Boeing 737 MAX

23,000 – 28,000 pounds thrust

LEAP-1C - Comac C919

27,980 – 30,000 pounds thrust


Aerodynamically efficient. 3-D woven.

The LEAP engine’s fan blades are manufactured from 3-D woven RTM (Resin Transfer Molding) carbon fiber composite, an industry first for CFM. This technology results in fan blades that are not only lightweight but so durable that each individual blade is strong enough to support the weight of a wide-body airplane like the Airbus A350 or Boeing 787.

500lbs less
per engine

3-D printed. Lighter yet stronger.

The LEAP engine is the first engine to use additive manufacturing to “grow” complex, fully dense yet lighter engines. Its fuel nozzles are 25% lighter than previous models and five times more durable than parts manufactured conventionally.


The LEAP engine features the second generation Twin-Annular, Pre-Mixing Swirler Combustor (TAPS II). TAPS II reduces NOx emissions by 50%* versus CAEP/6 standards. Unlike traditional combustors that mix fuel and air inside the combustion chamber, the LEAP nozzle pre-mixes these elements to provide what our engineers call lean burn combustion. We just call it revolutionary.


The unique LEAP debris rejection system provides the best erosion protection, preventing sand, dirt, and other harmful items from reaching the core. As a result, the highly durable, more efficient LEAP engine stays newer for longer.


On its way to engine certification, CFM pushed its LEAP test program to the limit. To meet the performance and reliability expectations made to its customers, a total of 60 LEAP engines were built to execute the most extensive ground and flight test certification program in the company’s history.


To date, the LEAP-1A and LEAP-1B engines have been jointly certified by EASA and FAA.


CFM has launched its most comprehensive readiness plan ever, ensuring smooth, successful entries into service for all LEAP operators.

Dedicated Expert Field Service Engineers (FSE) network

Entry-into-Service Road map customized for each client

Reactivity or Support stress tests

Opening of a new Customer Support Center (CSC) for LEAP (Available 24/7)

New dedicated LEAP Maintenance Training Centers

A proven global support network is already in place:

Customer Support Managers
Global Field Service Engineers
Training Centers on 3 Continents
Customer Support and Diagnostics Centers


CFM has produced and delivered the world’s largest fleet of jet engines in the single-aisle market. To ensure the ramp-up in production for the new LEAP engine, CFM is modernizing and expanding production facilities. Both GE and Safran Aircraft Engines have added new manufacturing capability at sites throughout the U.S. and France, making a combined capital investment of more than $1 billion USD.


2016 promises to be another strong year for CFM

Celebrating CFM LEAP Year: Keeping the promise

Asiana places $950 million order for LEAP-1A engines for A321neo aircraft