Overspeed Governor Test Switch; Fuel System - Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual

SECTION 7
AIRPLANE AND SYSTEMS DESCRIPTION
PROPELLER

OVERSPEED GOVERNOR TEST SWITCH

An overspeed governor test switch is located on the left side of the
instrument panel. The switch is the push-to-test type and is used to test
the propeller overspeed governor during engine run-up. The switch,
when depressed, actuates a solenoid on the propeller overspeed
governor which restricts propeller RPM when the power lever is
advanced. To check for proper operation of the overspeed governor,
during engine run-up, depress the press-to-test switch and advance the
power lever until propeller RPM stabilizes; propeller RPM should not
exceed 1750 +/- 60 RPM.

FUEL SYSTEM

The airplane fuel system (see Fuel System figure) consists of two
vented, integral fuel tanks with shutoff valves, a fuel selectors off
warning system, a fuel reservoir, an ejector fuel pump, an electric
auxiliary boost pump, a reservoir manifold assembly, a firewall shutoff
valve, a fuel filter, an oil-to-fuel heater, an engine-driven fuel pump, a
fuel control unit, a flow divider, dual manifolds, and 14 fuel nozzle
assemblies. An ecology tank is also provided to collect unused fuel
from the fuel manifold during engine shutdown. This unused fuel is
returned to the engine through an ejector pump during the next engine
start. Refer to the Fuel Quantity Data Chart for information pertaining to
this system.
Unusable fuel levels for this airplane were
determined in accordance with Federal Aviation
Regulations. Failure to operate the airplane in
compliance with the fuel limitations specified in
Section 2 may further reduce the amount of fuel
available in flight.
Fuel flows from the tanks through the two fuel tank shutoff valves at
each tanks. The fuel tank shutoff valves are mechanically controlled by
two fuel selectors, labeled LEFT, ON and OFF, located on the overhead
panel. By manipulating the fuel selectors, the pilot can select either left
or right fuel tanks or both at the same time. Normal operation is with
both tanks on. Fuel flows by gravity from the shutoff valves in each tank
to the fuel reservoir.
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WARNING
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CESSNA
MODEL 208B 867 SHP
GARMIN G1000
208BPHCUS-01