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CONVENTIONAL WING FLAP SYSTEM-Cont.
HYDRAULIC DROOP AILERON SYSTEM

Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them
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Figure 9-33.—Wing flap system. Once actuated, the dump valve must be reset manual] y to restore the system to normal operation. The emergency selector valve handle must first be returned to the NORMAL position, relieving the pressure in the emergency line. The dump valve is then reset by pushing the button on the dump valve. The button is marked PUSH TO RESET. With pressure in the normal system, the normal selector handle must be placed in the down position to reset the integral shuttle valve. The flaps will then raise using normal control, provided the flap up portion of the system is operative. There are no provisions for emergency retraction of the flaps. LEADING/TRAILING EDGE WING FLAP SYSTEMS Several types of naval aircraft are equipped with flap systems that feature both leading edge and trailing edge flap panels. On some aircraft these leading edge panels are referred to as slats. 9-39







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