Section
VII
Systems
Description
BEECHCRAFT
Duchess
76
that the fuel quantity indicators are functioning and maintain-
ing a reasonable degree
of
accuracy, and
be
certain of
ample'
fuel for each flight. A minimum
of
~_
qallons
of
fuel is required
in each wing system before
takeoff.-
. .
ELECTRICAL
SYSTEM
The
system circuitry is the single-wire, ground-return type,
with the airplane structure used as the ground return. The
alternator switches, battery switch, magneto/start/prime
switches, and auxiliaryfuel pump switches
are
located on the
pilot's subpanel. This panel contains
most
of
the electrical
system switches
and
switch-type circuit breakers. Each is
placarded
as
to its function. The right subpanel contains the
protective circuit breakers for the various electrical systems,
and all avionics circuit breakers.
BATIERY
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fuselage compartment.
An
optional installation (ME-183
and
after) provides two 12-volt,
25-ampere-hour,
lead-acid
batteries, electrically connected in series and installed in the
battery box. Battery servicing procedures are described in
the HANDLING, SERVICING, and MAINTENANCE section.
The
battery box is fitted with a lid for access
to
the battery
or
batteries. The lid
is
held
in
place with
two
lift-ta-release
latches.
Battery fumes and gases are vented to the outside through
two
vents
in
the lower fuselage skin below the battery box.
The
vents are so designed that there is a flow
of
air from the
vent
to
the top of the box and
out
through the vent at the
bottom
of
the box.
7-26
April
1979
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