their normal inoperative position and stop. Turning the
switch only to the OFF position will stop the windshield
wipers, without returning them to the normal inactive
2-63. CHEMICAL TOILET.
a. Description. A side-facing chemical toilet,
which can also be used as an additional seat, is
installed in the aft cabin area. Two hinged-lid half-
sections must be raised to gain access to the toilet.
Waste is stored within a removable container located
below the seat in the cabinet assembly. This non-
flushing system uses a dry chemical preparation to
deodorize the stored waste. A toilet tissue dispenser
is contained in a slide-out compartment on the forward
side of the toilet cabinet assembly. A box of
disposable waste container liners and a box of
chemical deodorant packets are also stored in the
throwaway plastic liner is attached to the waste
container. After use, dry chemical deodorant obtained
from the storage cabinet is deposited on the waste and
the hinged lid sections are closed over the cavity.
After each flight, the waste container must be
removed, emptied, relined, and replaced in the
cabinet. Consumable toilet items should be re-
supplied as needed.
2-64. ELECTRICAL TOILET T3 F3 .
A side-facing toilet is located opposite the airstair
door. A curtain is provided which, when extended
across the passenger compartment, separates the
toilet area. The seat may also be used as a
The toilet is a re-circulating electric flush type.
Normal servicing is within 2-1/2 gallons of fluid, which
provides for approximately 15 uses. When the
container is removed for servicing, it is sealed.
Chemical is mixed with water in a ratio of 3 ounces to
2 quarts of water.
Power for the electric flush motor is provided
through either the FURN ON or COFFEE OFF
positions of the furnishings switch located on the
copilot's inboard side panel.
Also located in a storage area along the fuselage
wall is a relief tube. A lever type handle is
incorporated which, when pressed, allows suction from
outside air to draw waste overboard through the relief
2-65. SUN VISORS.
When adjusting the sun visors, grasp only
by the top metal attachment to avoid
damage to the plastic shield.
Individual sun visors are provided for the pilot
and copilot. Each visor is manually adjustable. When
not needed as a sun shield, each visor may be rotated
to a position flush with the top of the cockpit so that it
does not obstruct view through the windows.
Section VIII. HEATING, VENTILATION, COOLING, AND ENVIRONMENTAL
2-66. HEATING SYSTEM.
Warm air for heating the cockpit and cabin and
for defrosting the windshield is provided by bleed air
from both engines. Engine bleed air is combined with
ambient air in the heating and pressurization flow
control unit in each engine nacelle. If the mixed bleed
air is too warm for cockpit comfort, it is cooled by being
routed through an air-to-air heat exchanger located in
the forward portion of each inboard wing. If the mixed
bleed air is not too warm, the air-to-air heat
exchangers are bypassed. The mixed bleed air is then
ducted to a mixing plenum, where it is mixed with
cabin re-circulated air. The warm air is then ducted to
the cockpit outlets, windshield defroster outlets, and
floor outlets in the cabin compartment. The
environmental system is shown in Figure 2-26.
a. Bleed Air Flow Control Unit. A bleed air
flow control unit, located forward of the firewall in each
engine nacelle, controls the flow of bleed air and the
mixing of ambient air to make up the total airflow to the
electronically controlled with an integral electric
solenoid firewall shutoff valve, controlled by the
BLEED AIR VALVES switches located on the copilot's
subpanel, and a normally open
operated by the right landing gear safety switch.
b. Pneumatic Bleed Air Shutoff Valve. A
pneumatic shutoff valve is provided in each engine
nacelle to control the flow of bleed air to the surface
and brake deice systems. The BLEED AIR VALVES
switches, located on the copilot's subpanel, control