<![CDATA[The availability of aircraft spare parts plays a crucial role in supporting maintenance effectiveness, particularly in scheduled maintenance activities. One of the main challenges faced by airlines is material procurement delays, which can lead to Aircraft on Ground (AOG) conditions and increased operational costs. This study aims to analyze aircraft spare parts procurement management strategies to improve maintenance effectiveness at Garuda Indonesia Airline. The research employed a descriptive quantitative approach using the Economic Order Quantity (EOQ) method, Safety Stock, Reorder Point (ROP), and Total Inventory Cost (TIC) analysis. The study focused on landing gear spare parts used in A-Check maintenance of Airbus A320 aircraft during the 2023–2024 period. The results indicate that implementing the EOQ method reduces total inventory costs and optimizes order frequency compared to the existing procurement system. Furthermore, appropriate determination of safety stock and reorder point minimizes stock-out risks and improves maintenance workflow efficiency. Therefore, EOQ-based procurement management strategies are proven to enhance aircraft maintenance effectiveness. Keywords: Spare parts procurement, EOQ, safety stock, reorder point, aircraft maintenance]]>
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