Worked on the leadsgroup/RCAIDE_LEADS repository to address a critical bug affecting the Conventional Payload Range Diagram, focusing on accurate payload capacity calculations under maximum fuel and payload constraints. Applied algorithm optimization and performance analysis skills to refine the logic, ensuring that range estimations now reflect real-world mission planning requirements. The solution, implemented in Python, improved the reliability of output data and reduced the risk of incorrect predictions for capacity planning. Delivered the fix as a focused, traceable commit, supporting future maintenance and auditability while maintaining code quality. No new features were added during this period, emphasizing disciplined debugging practices.