RESERVOIR FUEL LOW ANNUNCIATOR
A reservoir fuel low warning system is provided and consists of one
optical sensor in the fuel reservoir bladder which provides visual and aural
annunciation through the G1000. The warning system is activated when the
fuel level in the reservoir decreases. Visual annunciation is displayed as
follows:
RESERVOIR FUEL
FUEL PRESSURE LOW ANNUNCIATOR
A fuel pressure low warning system warns the pilot if the motive ow-driven
ejector pump fuel pressure falls below approximately 4 PSI. The warning
system consists of a pressure switch installed between the ejector pump and
the airframe fuel manifold. Visual and aural annunciation is provided through
the G1000. Visual annunciation is displayed as follows:
FUEL PRESS LOW
AUXILIARY FUEL PUMP ON ANNUNCIATOR
An AUX PUMP ON advisory annunciation is provided through the G1000.
The annunciator will illuminate any time power is supplied to the auxiliary fuel
pump. The auxiliary fuel pump will automatically activate when the pressure
from the motive ow-driven ejector pump falls below approximately 4 PSI.
If the AUX PUMP ON annunciator continues to cycle on and off when the
auxiliary fuel pump switch is placed in the STBY position, the auxiliary fuel
pump switch should be moved to the ON position. Visual annunciation is
displayed as follows:
AUX PUMP ON
DRAIN VALVES
Engine Drain Valves
Depending on the EPA can conguration, a total of ten or eleven drain valves
are installed on the airplane. Drain valves are located on the lower portion of
the wings near the root, on the lower surface of the fuselage, at the rewall-
mounted fuel lter, and either at the engine drain can (EPA fuel reservoir) on
the lower left side of the cowling, or on the two engine drain cans on the lower
left side of the rewall. The drain valves provide a means for the examination
of fuel in the system, for proper grade and signs of contamination, and for
draining the reservoir to prevent overow of residual fuel from the engine onto
the ground.
The wing tank drain valves, fuel bladder drain valve, fuselage fuel line
low spot drain valves, and cowl-mounted EPA fuel reservoir drain valve (if
equipped) are constructed in such a way that a screwdriver (or similar tool)
may be used to depress the valve on the fuel sampler cup to release fuel.
For normal fuel sampling from the drain valves, the valve merely needs to
be pushed in to draw enough fuel from the sumps as required for sampling
purposes. For draining larger quantities of fuel, the valve may also be twisted
to lock it in the open position.
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