2-65. CHEMICAL TOILET.
Description. A side-facing chemical toilet is
installed in the aft cabin area, and can also be used as an
additional seat 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 A box of disposable
waste container liners and a box of chemical deodorant
packets are alsostored in the cabinet
Operation. During use, a removable throw-away
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
resupplied as needed.
2-66. 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 (fig. 2-8). Each visor is manually adjustable.
When not needed as a sun shield, each visor may be
manually rotated to a position flush with the top of the
cockpit so that it does
not obstruct view through the windows.
2-67. RELIEF TUBE.
One relief tube is provided, located immediately aft of the
Section VIII. HEATING, VENTILATION, COOLING, AND ENVIRONMENTAL CONTROL
2-68. HEATING SYSTEM.
Warm air for heating the cockpit, mission equipment
compartment, and windshield defrosting is provided by
bleed air from both engines. Engine bleed air is
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 recirculated air. The warm air is then ducted to the
cockpit outlets, windshield defroster outlets, and to the
floor outlets in the mission equipment compartment. The
environmental system is shown in figure 2-26.
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 cabin for heating,
windshield defrosting, pressurization, and ventilation. The
unit is electronically controlled with an integral electric
solenoid firewall shutoff valve, controlled by the bleed air
switches located on the overhead control panel (fig. 2-13)
and a normally open solenoid valve operated by the right
landing gear safety switch
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, antenna, and brake
deice systems. These valves are controlled by the bleed
air valve switches located on the overhead control panel
Bleed air valve switches. The bleed air flow
control unit shutoff valve and pneumatic bleed air shutoff
valves are controlled by two LEFT and RIGHI switches
placarded ENVIRO & PNEU BLEED AIR - PNEU ONLY -
ON, located on the overhead control panel (fig. 2-13).
When set to the ON position, both the environmental flow
control unit shutoff valve and the pneumatic shutoff valve
are open; when set to the PNEU ONLY position, the
environmental flow control unit shutoff valve is closed,
and the pneumatic bleed air valve is open; in the ENVIRO
& PNEU position, both are closed. For maximum cooling
on the ground, turn the bleed air valve switches to the
PNEU ONLY position
Cabin temperature mode selector switch. A
switch placarded CABIN AIR MODE SELECT - OFF -
AUTO- AC COLD OPN 10C to -25C - MAN COOL -
MAN HEAT located on the overhead control panel,
controls cockpit and mission avionics compartment
heating and air conditioning. When the cabin temperature
mode selector switch is set to the AUTO position, the