The Arriel 1 turboshaft engine features a very simple design, with a reduced number of parts and only five modules, for easy maintenance. The Arriel 1 has gained a solid reputation in the helicopter market based on its excellent handling characteristics and high level of reliability. The Arriel 1 has a TBO (Time Between Overhaul) of 3,000 hours, which can be extended to "on condition" on Module 1 and to 6,000 hours on Modules 2 and 4.

The Arriel 1E2 powers the twin-engine EC 145 / UH145 and BK 117 C1 helicopters, capable of carrying up to 9 passengers. It performs in police, passenger transport, rescue and EMS roles.

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