section
VII
Systems
Description
BEECHCRAFT
Duchess
76
FUEL TANKS
The fuel system consists of a bonded leading-edge fuel tank
located outboard of the nacelle in each wing. The fuel tank
in
each wing has a capacity of 51.5 gallons for a total
fuel
capacity
of
103 gallons (100 gallons usable). Each wing is
serviced through a single filler located
in
the outboard portion
of each wing.
The
filler neck
of
each tank contains a visual
measuring tab which facilitates partial filling of the fuel sys-
tem. When the fuel level reaches the bottom of the tab, it
indicates
30
(28.5 usable) gallons of fuel in that tank. The
center mark on the tab indicates
40
(38.5 usable) gallons of
fuel and the mark at the top indicates a full tank of 51.5
(50
usable) gallons
of
fuel.
FUEL SELECTOR VALVES
The fuel selector valves are located in each nacelle on the
outboard side just forward
of
the
wing· leading edge. The
valve is of the rotary type and is operated by push-pull cable
from the floor console between
the
front seats. The valve
has three positions,
ON
- CROSSFEED - OFF, which are
determined by detents in the valve. The floor console has a
slot for each selector valve lever, with notches which
correspond to
the
valve detents.
During operation, make certain fuel selector
valves are
in
detent in the
ON
position. This can
be determined by moving the levers slightly
within the detent notch.
.operation with the
V;::l~ve
sliqhtlv
out
of
dete.nt
could
result in fuel
tranSferring from one wing tank to the other.
The fuel selector
valvesalsbfunction
as
a preflight drain
point and firewall fuel shutoff.
The
lower portion
of
the valve
serves as a sediment bowl and contains the fuel strainer
screen.
7-22
April
1979
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