8411.21.40.00 - Aircraft turbines

This HTS classification, 8411.21.40.00, specifically covers aircraft turbines designed as turbopropellers with a power output not exceeding 1,100 kW. These are propulsion systems commonly found in smaller to medium-sized aircraft, where the turbine drives a propeller to generate thrust. The classification focuses on the engine's core function and its intended application within the aviation sector.

Distinguishing this category from its sibling, 8411.21.80.00, is crucial. While both fall under turbopropellers of a power not exceeding 1,100 kW, the "Other" designation implies a broader scope that might include specialized components, experimental units, or turbopropellers that do not fit into more specific subdivisions if they existed. This particular classification narrows the focus to the primary turbopropeller units themselves within the specified power range.

As this node represents a leaf node within the HTS structure, there are no further subcategories. Therefore, classification at this level requires careful adherence to the defined power threshold of 1,100 kW and confirmation that the unit is indeed a turbopropeller intended for aircraft propulsion. Examples within this category would include turbopropeller engines used in general aviation aircraft, regional airliners, and certain military trainer aircraft, provided they meet the stated power limitation.