Aircraft maintenance is an essential engineering process for maintaining aircraft safety, operational efficiency, and the readiness of their various systems. Maintenance is not limited to repairing faults after they occur; it also includes regular and preventive inspections to detect potential problems at an early stage before they affect aircraft performance. Maintenance operations involve inspecting engines, aircraft structures, control systems, electrical and electronic equipment, fuel systems, and hydraulic systems, in addition to many other components. These activities are carried out according to precise maintenance schedules based on flight hours, number of flights, component condition, and the instructions provided by manufacturers and relevant authorities. Regular maintenance helps detect corrosion, cracks, and faults before they develop into serious problems. It also contributes to maintaining aircraft efficiency and reducing the possibility of unplanned downtime. Therefore, aircraft maintenance relies on accuracy, engineering expertise, modern technologies, and strict compliance with safety procedures to ensure high levels of reliability and safety in the aviation sector. Lecturer Assistant Al-Boraq Hayder Mohsin