Fuel system ventilation is critical to system operation. Complete blockage of
the vent system will result in a decrease in fuel ow and eventual stoppage
of the engine. Fuel system ventilation is provided by vent lines at each fuel
tank. The vent lines are equipped with check valves, and pressure valves to
help prevent fuel from owing out of the vent lines during maneuvering of the
aircraft. The vent lines protrude from the lower outboard portion of the wings
just forward of the ailerons. The fuel reservoir is also vented through both
wing tank vent lines.
Figure 7-74 – Fuel System Schematic
FIREWALL FUEL SHUTOFF VALVE
A manual rewall fuel shutoff valve is installed on the aft side of the rewall.
The shutoff valve enables the fuel from the reservoir to be shutoff completely
from the engine. The shutoff valve is controlled by a red push-pull knob
installed on the upper portion of the control pedestal. The rewall fuel shutoff
valve is labeled FUEL SHUTOFF – PULL OFF. The knob has a press-to-
release button in the center which locks the knob in place when the button is
released.
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