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GE Aerospace aims for year-end FAA approval for Catalyst turboprop engine

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GE Aerospace aims for year-end FAA approval for Catalyst turboprop engine
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GE Aerospace’s Catalyst turboprop engine is meeting and exceeding its targeted performance numbers and is on track for FAA certification by year-end, the company announced this week at EAA AirVenture 2024. The engine powers Textron Aviation’s Beechcraft Denali single-engine turboprop, which is set for certification next year. Both are on display at AirVenture, marking the first time the GE display is hosting the actual engine instead of a mockup.

Engines in the flight-test program have logged more than 2,100 hours and 900 flights, which “gives a lot of confidence in the performance,” noted Paul Corkery, head of GE's Catalyst program. Compared to other 1,300-shp powerplants, he said the GE engine burns 18% less fuel while producing 10% more power at altitude.

Catalyst's Fadec engine controls, adapted from systems on larger GE turbine engines, are integrated with the Denali’s Garmin G3000 avionics and autothrottle. This integration enables Textron Aviation engineers to design a single-lever power control that simplifies pilot workload and protects the engine from exceeding critical parameters.

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The $6.95 million Denali first flew on Nov. 21, 2021. While certification was initially planned for 2023, delays in the Catalyst program pushed that timeline to 2025. According to Corkery: “We faced tough new regulations that were more challenging than expected.” These regulations pertained to ice crystal and super-cooled liquid droplet mitigation. “We had to bring in very experienced folks to get those [requirements] over the line,” he added. “Those were big headwinds. But we feel we’ve mitigated the risk to get certification by the end of the year.”

For FAA certification, the Catalyst had to complete 23 key engine-level tests; 19 of these tests have been completed so far. The remaining four—covering endurance, vibration, blade-out, and compressor operability—are currently underway in four separate test cells. “We expect all that testing to be wrapped up by the end of the third quarter,” Corkery stated, “then we’ll be finalizing and submitting the final reports.”

Meanwhile, GE is establishing its service infrastructure to support Catalyst once Denali begins shipping. The production readiness phase is also underway with GE having already built 35 engines. “We’ll deliver what Textron Aviation needs,” Corkery said. “We’re aligned with their schedule.”

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