Section
VII
Systems
Description
BEECHCRAFT
Duchess
76
4. The push-pull knob, located below the cabin air control,
placarded CABIN TEMP - PULL
TO
INCREASE, controls the
temperature
of
the
air entering the cabin. Pulling aft on the
knob increases
the
temperature at which the duct thermostat
switch opens (controlling the heater).
CABIN VENTILATION
In flight, to provide unheated air through the same outlets
used for heating, push the CABIN AIR and CABIN
TEMP
controls forward.
The
air intake for this system is located on
the right side
of
the
nose compartment.
For ventilation through these same outlets during ground
operation, push the CABIN AIR control forward and place
the
three-position switch, on the pilot's subpanel, in the
BLOW-
ER
ONLY position. The BLOWER ONLY position is
for
ground operation only and will shut off the blower when
the
landing gear
is
retracted.
Fresh ram air is also provided through an outlet located on
each side
of
the instrument panel. Fresh air for these outlets
enters the
two
vents located immediately forward
of
the wind-
shield. Rotation
of
the outlets controls the flow
of
air.
OVERHEAD FRESH AIR OUTLETS
Fresh air from the intake on the left side
of
the dorsal fin is
ducted
to
the individual outlets located above each seat.
The
volume of air at each outlet can be regulated by rotating the
outlet. Each outlet can be positioned to direct the flow
of
air
as
desired.
An
optional fresh air blower for this system is
located in
the
aft fuselage. The blower is controlled by the
7-38
January
1978
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