8407.10.00.20 - Less than 373 kW

This HTS classification covers spark-ignition reciprocating or rotary internal combustion piston engines specifically designed and intended for use in civil aircraft, with a power output of less than 373 kilowatts (kW). These engines are integral components for the propulsion of various civilian aircraft, ranging from smaller general aviation planes to larger commercial aircraft, provided they meet the specified power threshold. The "New" designation indicates that these are factory-new engines, not rebuilt or used units.

The primary distinction for this category lies in its power output, which is explicitly defined as being under 373 kW. Its sibling category, HTS 8407.10.00.40, encompasses similar aircraft engines but are rated at 373 kW or greater. Therefore, the classification hinges on a precise measurement of the engine's maximum power delivery capacity.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification at this level is definitive based on the engine's intended use in civil aircraft, its spark-ignition internal combustion type, and its power rating falling below the 373 kW threshold.