A technological LEAP forward

The LEAP® engine was developed by Safran Aircraft Engines and GE through their joint company, CFM International, to power the next generation of single-aisle commercial jets. Combining the best technologies from the two partners, LEAP offers operators exceptional performance while retaining the legendary reliability of the CFM56®. These capabilities have already made the engine a best seller, even before it has entered revenue service.

LEAP-1C: integrated propulsion system for the Comac C919

The LEAP-1C, the first member of the LEAP® engine family, was selected by Comac (Commercial Aircraft Corporation of China) as the sole Western powerplant for its new C919 single-aisle jetliner. It offers operators exceptional technical, economic and environmental performance, with a 15% reduction in fuel consumption and CO2 emissions versus current engines,  and up to 50% margin on NOx emissions versus CAEP/6, and in compliance with the most stringent noise standards (the ICAO's Chapter 14 regulations

CFM, in partnership with Nexcelle*, will deliver a complete integrated propulsion system (IPS) for the new Chinese jetliner, also including the nacelle and the thrust reverser.


The LEAP-1C was the first LEAP engine to begin flight testing, on a flying testbed (FTB) at Victorville, California, in September 2014 and operated its first flight in Shangaï in May 2017.

*Nexcelle is a 50/50 joint venture between Middle River Aircraft Systems (GE) and Safran Nacelles



Applications COMAC C919ST, COMAC C919ER
Max. takeoff thrust (lbf) 31,000
Bypass ratio 11
Fan diameter (in) 77
Number of fan/low-pressure/high-pressure compressor stages 1+3+10
Number of high-pressure/low-pressure turbine stages 2+7
Entry into service 2018


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