8543.90.15.00 - Printed circuit assemblies

HTS Code 8543.90.15.00 specifically classifies printed circuit assemblies that are part of flight data recorders. These assemblies are characterized by their construction from two or more interconnected components, designed to function as a unit within a flight data recording system. The crucial element for classification under this heading is the assembly's integration and purpose within such a recording device, distinguishing it from general-purpose printed circuit boards.

This category is differentiated from its sibling, 8543.90.35.00 ("Other"), which encompasses all other parts and accessories of electrical machinery and equipment not specifically enumerated. While other parts and assemblies classified under 8543.90.35.00 may include printed circuit boards, they lack the specific functional integration and design requirement to serve as a component of a flight data recorder. The defining characteristic here is the intended end-use and the integrated nature of the assembly for this specialized aviation application.

As a leaf node, HTS Code 8543.90.15.00 does not have further subcategories. Therefore, the classification focuses on identifying assemblies that meet the criteria of being printed circuit assemblies intended for and incorporated into flight data recorders. This includes, but is not limited to, memory modules, processing boards, and input/output interfaces specifically manufactured and configured for use within these critical aviation safety devices.