How Aircraft Hydraulic Systems Work: Follow the Fluid from Reservoir to Actuator

A pump you could hold in two hands can lift thousands of pounds of landing gear in seconds. The trick is one rule: force equals pressure times area. We follow the fluid through an aircraft hydraulic system, part by part: Pascal's law, the reservoir (vented vs pressurized), engine-driven and electric pumps, filters and bypass valves, pressure regulators and relief valves, selector, check, sequence, priority and shuttle valves, accumulators, actuators, lines, hoses and seals, and how airliners stay safe with multiple systems. Plus what an A&P mechanic inspects and the safety rules. Hydraulics week on the channel: daily oral and written A&P practice on the same topics. Reference: FAA-H-8083-31 Airframe Handbook, Hydraulic and Pneumatic Power Systems. Educational overview; always follow the aircraft maintenance manual.