LEAPTurbofan Engine

LEAP-1A:  24,500 – 32,900 POUNDS THRUST
LEAP-1B:  23,000 – 28,000 POUNDS THRUST
LEAP-1C:  27,980 – 30,000 POUNDS THRUST


The CFM LEAP family represents the engines of choice for the next-generation single-aisle aircraft. The LEAP-1A is an option on the Airbus A320neo; the LEAP-1B is the exclusive powerplant for the Boeing 737 MAX; and the LEAP-1C is the sole Western powerplant for the COMAC C919. These engines had garnered more than 8,000 operates from more than 50 customers across the globe.




CFM and its parent companies have fielded more new engines, engine upgrades, new technologies, and have more field experience as measured in engine flight hours than anyone else. Performance and technology is better proven than promised.


Performance advancements are driven by appropriate application of new technology throughout an engine. Success in development of new technology requires the combination of both consistent investment and opportunities for commercial application.

Two engine families have contributed significantly to the design of the LEAP engine, the CFM56 and the GE90/GEnx series of engines. The GE90/GEnx contributed the high-efficiency core architecture to minimize fuel consumption, while the CFM56 legacy drove reliability and maintenance cost design practices. At entry into service in 2017, it is estimated that the GE90/GEnx architecture will have generated 80 million flight hours of revenue service, while the CFM56 family will have over 700 million flight hours of experience. The LEAP engine family offers proven, material advantages over any other engine, with 550,000 hours of proven experience with 99.98% reliability, and 22,000 engines delivered on-time and on-spec.

The CFM LEAP pedigree ensures with confidence the ability to deliver a 15% improvement in fuel efficiency, as compared to the CFM56-7BE, while maintaining the same level of dispatch reliability and life-cycle maintenance costs as the CFM56-7BE. With its simple architecture and $2 billion annual investment in technology, the LEAP engine family offers the lowest cost and highest revenue-generating ability, saving an estimated nearly $3 million per plane.

This is CFM, proven performance, low execution risk, and the application of advanced technology both at entry into service and throughout an engine’s life cycle.


  • Proven, high-efficiency core architecture
  • Up to 15% improvement in fuel efficiency compared to today's best CFM56 engines
  • Same high level of dispatch reliability and low life-cycle maintenance costs as today's best CFM56 engines
  • 700,000 hours of proven experience


LEAP-1A - Airbus A320neo

LEAP-1B - Boeing 737 MAX

LEAP-1C - Comac C919



Milestone Date Milestone Date
LEAP56 (Leading Edge Aviation Propulsion) begins June 2005 Virgin America launches LEAP engine with $1.4 billion order
June 2011
Initial component and rig tests 2008 LEAP fan blade-out rig test is successfully completed June 2011
Composite fan case containment test, fan aerodynamic and bird strike tests, TAPS combustor and high-pressure compressor rig tests and high- and low-pressure turbine component tests 2008 Testing validates ultra-high-efficiency LEAP low pressure turbine June 2011
CFM launches LEAP to power future replacements for current narrow-body aircraft June 2008 Advanced LEAP fan endurance test complete August 2011
First LEAP core testing begins November 2009 Boeing selects LEAP-1B as sole powerplant for new 737 MAX August 2011
CFM completes eCore demonstrator 1 testing July 2010 First LEAP-1A/-1C engine begins ground testing two days ahead of schedule September 2013
Launch of the LEAP-1C-powered C919 is announced November 2010 First LEAP-1B engine begins ground testing two days ahead of schedule June 2014
LEAP engine is selected to power Airbus A320neo December 2010    


The LEAP engine will be the first to introduce Ceramics Matrix Composites into commercial service.  The engine will feature a CMC shroud in first stage of the high-pressure turbine.

It takes 150,000 miles of carbon fiber to create on LEAP fan blade.  One LEAP fan blade is so strong, it can support the weight of a wide-body airplane like the Airbus A350 or Boeing 787.

The LEAP TAPS II combustor reduces NOx emissions by 50% compared to current CFM 56 engines with identical overall pressure ratio.

The unique LEAP debris rejection system helps prevent sand, dirt, and other harmful items from reaching the core.  As a result, the LEAP engine stays newer, longer.

Non-commercial use, only For exchanging and learning
For details: http://www.geaviation.com/