LEARNING OBJECTIVE: Identify the components of aircraft hydraulic systems and recognize their functions. The aircraft hydraulic systems found on most naval aircraft perform many functions. Some systems operated by hydraulics are flight controls, landing gear, speed brakes, fixed-wing and rotary-wing folding mechanisms, auxiliary systems, and wheel brakes. Hydraulics has many advantages as a power source for operating these units on aircraft. ! Hydraulics combine the advantages of lightweight, ease of installation, simplification of inspection, and minimum maintenance requirements. ! Hydraulics operation is almost 100-percent efficient, with only a negligible loss due to fluid friction. However, there are some disadvantages to using hydraulics. ! The possibility of leakage, both internal and external, may cause the complete system to become inoperative. ! Contamination by foreign matter in the system can cause malfunction of any unit. Cleanliness in hydraulics cannot be overemphasized
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