Author ORCID Identifier:

https://orcid.org/0009-0003-5192-9717

Date of Graduation

8-2025

Document Type

Thesis

Degree Name

Master of Science in Mechanical Engineering (MSME)

Degree Level

Graduate

Department

Mechanical Engineering

Advisor/Mentor

Majumdar, Neelakshi

Committee Member

Campbell, Jenn

Second Committee Member

Huang, Po-Hao Adam

Keywords

Accident Severity Analysis; Aerospace Engineering; Fixed-wing Aircraft; General Aviation Safety; Predictive Modeling; Stall and Spin

Abstract

Stall and spin accidents represent a persistent safety concern in General Aviation, with approximately 41% resulting in fatalities despite their relatively low occurrence. This study analyzes 1,079 General Aviation stall and spin accidents from 2008 to 2023 using the National Transportation Safety Board accident database. Our analysis identified the top phases of flight, injury outcomes, and causal factors in stall/spin accidents. Findings indicate that over 93% of stall/spin events involved General Aviation aircraft, with most accidents occurring during initial climb, takeoff, or low-altitude maneuvering. Pilot-related control errors, especially poor airspeed and angle-of-attack management, were the most common causes. To assess accident severity prediction, we trained machine learning models—Logistic Regression, Decision Tree, Random Forest, and XGBoost—on structured features. The Random Forest model achieved the best performance (accuracy = 0.81, ROC-AUC = 0.89), demonstrating potential for integration into safety monitoring and training systems. The findings offer an interpretable, data-driven framework for identifying high-risk scenarios and informing targeted training to prevent stall/spin accidents in General Aviation. Building on prior text-mining and state-based modeling of NTSB reports, we also examined environmental factors such as airport elevation, altimeter settings, and light conditions, as well as human factors like pilot age. Feature-importance analysis revealed that in-flight loss of control, engine power loss, and recovery attempts are among the strongest predictors of fatal outcomes. Temporal trends show a modest decline in fatality proportion since 2015, suggesting improvements in pilot training and aircraft safety systems. The resulting severity-prediction tool is highly interpretable and can be embedded in real-time flight-data monitoring platforms to support proactive risk mitigation in General Aviation.

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