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How is air generally removed from an aircraft hydraulic system?
By applying external pressure
By draining the system
By heating the fluid
By cycling the hydraulic components
The correct answer is: By cycling the hydraulic components
Air is generally removed from an aircraft hydraulic system by cycling the hydraulic components. When the hydraulic components are cycled, such as by moving the landing gear up and down or actuating the flight control surfaces, any trapped air bubbles are forced out of the system. This process helps ensure that the hydraulic system operates efficiently without any air pockets which could cause malfunctions or reduced system performance. Option A is incorrect because applying external pressure does not specifically target the removal of air from the hydraulic system. Option B is incorrect because draining the system would not necessarily remove the air bubbles trapped within the system. Option C is incorrect because heating the fluid does not address the issue of removing air from the hydraulic system effectively.