What is fault tree analysis and how can it be used in aviation mishaps?

• A. A deductive method to map out potential causes and their relationships to identify root causes and critical failure paths.
• B. A method for weather pattern analysis.
• C. A financial risk assessment technique.
• D. A manufacturing cost analysis.

Answer: (A)

Fault tree analysis is a deductive analysis method that starts with a defined top event and maps out the logical relationships showing how various causes combine to produce that event. In aviation mishaps, investigators begin with the incident itself and work downward, identifying basic events such as equipment failures, human errors, or environmental factors, and showing how they connect through AND and OR logic to lead to the top event. This structure makes it clear which combinations of failures are responsible and which paths are most critical, highlighting root causes and the key failure paths that drive risk. By analyzing these paths, teams can prioritize corrective actions, maintenance improvements, and design changes to reduce the likelihood of recurrence. It’s also common to derive minimal cut sets—the smallest combinations of basic events that can cause the top event—which helps focus safety efforts where they will have the greatest impact. The other options don’t fit because weather pattern analysis, financial risk assessment, and manufacturing cost analysis focus on meteorology, monetary risk, or costs, not the logical decomposition of a mishap into its causal chain.