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The CFM International LEAP ("Leading Edge Aviation Propulsion") is a high-bypass turbofan engine produced by CFM International, a 50–50 joint venture between American GE Aerospace and French Safran Aircraft Engines. It is the successor of the CFM56 and competes with the Pratt & Whitney PW1000G to power narrow-body aircraft.
The first LEAP began ground testing at GE's Peebles (Ohio) facility in September 2013, then at Snecma’s plant in Villaroche the following year. The LEAP-1C is the first of the family to begin flight testing on a modified GE Boeing 747-100. In 2021, the CFM International partnership has been renewed until 2050 and extended to include services.
The GE Passport is a high bypass ratio turbofan. The engine is a twin-spool, axial-flow turbofan with a high bypass ratio of 5.6:1 and an overall pressure ratio of 45:1. The front fan is attached to the three-stage low-pressure compressor; the 23:1 pressure ratio 10-stage high-pressure compressor includes five blisk stages for weight reduction.
Jet engine maker CFM International said on Friday aviation regulators in the United States and Europe have certified a "more durable" high-pressure turbine kit for its LEAP-1A engines that power ...
The FAA said it is addressing an issue with the CFM LEAP-1B engine and is collaborating with Boeing, CFM and the European Union Aviation Safety Agency. FAA plans to review 737 MAX engine issue ...
With its 30:1 bypass ratio, it should deliver a 15% improvement over the CFM International LEAP already at 11:1; but Airbus is more interested in the more conventional ultra high bypass ratio (UHBR) turbofan at 15:1, which could be introduced from 2025, offering 5% to 10% better efficiency than the LEAP and to be tested from 2020. [30]