In this paper, we present an approach to automate the evaluation and improvement of geometric requirements during preliminary aircraft design, specifically focusing on the complex integration of subsystems like fuel systems. Utilizing the Codex (COllaborative DEsign and eXploration) platform and its submodule codex-geometry, we use Semantic Web Technologies (SWTs) to create a domain-neutral, integrated data representation. The system checks for compliance with geometric constraints in order to reduce manual work in the design. Building on previous work for requirement evaluation, this current research expands the system’s capabilities to suggest improved component placements when geometric inconsistencies are detected. The capabilities of this approach are demonstrated in an example use case placing fuel system components. Furthermore, we explore the use case of design space allocation impacted by an uncontained engine rotor failure.