The aeronautic sector, driven by globalisation and the growing demand for advanced transportation, is experiencing a substantial increase in the use of Carbon Fibre Reinforced Polymer (CFRP) components due to their high specific properties. As the fleet of aircraft expands, the challenge of managing End-Of-Life (EOL) CFRP materials from decommissioned aircraft becomes imminent. Current disposal methods, primarily landfilling, are unsustainable and do not take advantage of the excellent material properties of composites, highlighting the need for innovative recycling solutions. On the other hand, CFRP materials are widely recognized in the construction industry for their ability to enhance the strength of existing structures. While CFRPs offer significant improvements in the flexural performance of Reinforced Concrete (RC) structures, their high cost and the environmental impact associated with their production limit a broader application. This research pioneers the application of EOL aircraft CFRP components for strengthening concrete structures, aligning with Sustainable Development Goals by promoting resource efficiency and waste reduction. The study investigates the feasibility of this approach through an experimental assessment of the bond and flexural behaviour of RC beams strengthened with reused aircraft CFRP parts. It includes a series of single-shear and four-point bending tests for RC beams with identical dimensions but with different reused CFRP rectangular parts. The results, in terms of bond and flexural capacity, load-deflection behaviour, CFRP strain, concrete strain and failure modes are presented and compared with predictions obtained from code formulations used for conventional commercial CFRP materials.