A decision model of civil aircraft structural maintenance based on improved fuzzy comprehensive evaluation

Abstract As Chinese domestic civil aircraft are in the early stages of operation, the accumulated operational experience is limited. Maintenance outside the Structure Repair Manual (OSRM) is therefore frequently encountered during structural maintenance, which significantly impacts the safety and economic viability of civil aircraft operations. To address this challenge, this study proposes an OSRM maintenance decision model based on an improved fuzzy comprehensive evaluation, which makes full use of historical cases from similar aircraft models to improve maintenance efficiency. The study is in line with the characteristics of the initial operation phase of domestically produced civil aircraft, achieving the full utilization of limited historical data. It avoids the long decision-making cycles and low decision accuracy caused by limited data in the past, safeguarding the development of domestic civil aircraft.