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-1B: exclusive powerplant for the Boeing 737 MAX


The LEAP-1B® has been selected by Boeing as the exclusive powerplant for the new 737 MAX single-aisle jetliner. It offers 737 MAX 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 Standard, and in compliance with the most stringent noise standards (the ICAO's Chapter 14 regulations

The selection of the LEAP-1B by Boeing in 2011 continues a long-established partnership between CFM and the aircraft manufacturer. This trust was shown to be well-founded in June 2014, when ground testing of the LEAP-1B started, three days ahead of the original schedule, at Safran Aircraft Engines' Villaroche facility.

In May 2016, the LEAP-1B engine was simultaneously awarded Type Certificates by both the European Aviation Safety Agency (EASA) and the U.S. Federal Aviation Administration (FAA), has entered commercial service in May 2017 with Malindo Air.





Applications Boeing 737MAX7, Boeing 737MAX8, Boeing 737MAX9
Max. takeoff thrust (lbf) 28 000
Bypass ratio 9
Fan diameter (in) 69
Number of fan/low-pressure/high-pressure compressor stages 1+3+10
Number of high-pressure/low-pressure turbine stages 2+5
Entry into service 2017


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