This book comprises the proceedings of the 2023 International Symposium on Aircraft Technology, MRO, and Operations (ISATECH 2023), a multi-disciplinary symposium presenting research on current aerospace issues. It provides insights into the latest trends in aircraft technology, manufacturing, maintenance, repair, overhaul, and operations that offer innovative solutions to challenges faced by the aviation industry. Coverage includes the operational and MRO needs of hybrid, electric, all-electric, and fuel-cell air vehicles adapted to new technology standards. The use of artificial intelligence in aerospace, clean energy, emissions reduction, and aerospace legislation are also covered. ISATECH allows researchers, scientists, engineers, practitioners, policymakers, and students to exchange information, present new technologies and developments, and discuss future direction, strategies, and priorities.