Composite-material aircraft part and method of manufacturing same

A composite-material aircraft structure comprising:

• a laminated structure including composite-material layers that are laminated, wherein each composite-material layer includes at least a reinforced fiber and a resin composition,
• wherein the composite material aircraft structure is a three-dimensional structure that includes a T-shaped structure, and wherein:
• the composite-material layers include at least a composite-material layer in which the reinforced fiber is a single continuous fiber, wherein the single continuous fiber includes a partial slit region, and
• when a thickness of a flat-plate formed body including a same laminated structure as the composite-material aircraft structure, but not including the three-dimensional structure, is defined as a reference thickness, the composite-material aircraft structure includes a thin plate region which has a thickness that is smaller than the reference thickness while maintaining the laminated structure, and the thin plate region is directly adjacent to the T-shaped structure on both sides, and
• the reinforced fiber further includes a notch region in which partial slits of the partial slit region are in an open state.