In the context of DO-326A, Aircraft Level/Impact Analysis is the first step in the cybersecurity assurance process. It is concerned with evaluating the potential impact of a cybersecurity threat on aircraft safety, operations, and regulatory compliance. This level considers the aircraft as a complete, integrated system, including all its interconnected electronic systems, networks, software, and interfaces (both internal and external). It is not yet about individual components, but how they collectively contribute to the aircraft's airworthiness.
To learn more, refer to the following pages: