International announced it has successfully initiated ground testing of the first LEAP-1B engine that will exclusively power the 737 MAX. CFM ran the engine for the first time on June 13, three days ahead of schedule. The LEAP-1B engine, installed in a test cell at Snecma facilities in Villaroche, France, successfully completed a series of break-in runs before reaching full take-off thrust.

The engine will be on test for the next several weeks, as verifies mechanical operations, stall margin, engine starts and further validates the advanced technologies incorporated in the engine, including the woven composite fan, the Twin-Annular, Pre-Mixing Swirler (TAPS) combustor, ceramic matrix composite shrouds in the high-pressure turbine and the titanium aluminide blades in the low-pressure turbine.

The LEAP-1B is specifically optimized for the with a smaller, highly efficient core and benefits from these new technologies. The LEAP-1B engine contributes significantly to the 737 MAX’s fuel efficiency improvement. The 737 MAX will be 14% more fuel efficient than today’s Next-Generation 737s – and 20% better than the original Next-Generation 737s when they first entered service.

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