Do not operate windshield wipers on dry
glass. Such action can damage the linkage
as well as scratch the windshield glass.
b. Normal Operation. To start, turn WIND-
SHIELD WIPER switch to FAST or SLOW speed,
as desired. To stop, turn the switch to the PARK
position and release. The blades will return to their
normal inoperative position and stop. Turning the
switch only to the OFF position will stop the wind-
shield wipers, without returning them to the normal
2-64. FERRY CHAIR.
For ferry purposes, a forward facing chair with
a lap belt is attached to floor tracks at fuselage sta-
tion 211.87 (fig. 2-2).
2-65. CIGARETTE LIGHTERS AND ASH TRAYS.
The pilot and copilot have individual cigarette
lighters and ash trays mounted in escutcheons out-
board of their seats. The cigarette lighters are pro-
tected by a 5-ampere circuit breaker, placarded
CIGAR LIGHTER, on the overhead circuit breaker
panel (fig. 2-26).
2-66. CHEMICAL TOILET.
a. Description. A side-facing chemical toilet
(figure 2-2) 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
HEATING, VENTILATION, COOLING, AND ENVIRONMENTAL Control System
ducted to the cockpit outlets, windshield defroster
Description. Warm air for heating the cock-
pit and mission avionics compartments and warm
windshield defrosting air is provided by bleed air
container located below the seat in the cabinet
assembly. This non-flushing system uses a dry chem-
ical preparation to deodorize the stored waste. A toi-
let tissue dispenser is contained in a slide-out com-
partment on the forward side of the toilet cabinet. A
box of disposable waste container liners and a box
of chemicial deodorant packets are also stored in the
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, replaced in the cabinet and other
toilet items are resupplied as needed,
2-67. SUN VISORS.
When adjusting the sun visors, grasp only
by the top metal attachment to avoid
damage to the plastic shield.
A sun visor is provided for the pilot and copilot
respectively (fig. 2-8). Each visor is manually adjust-
able. 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.
2-68. RELIEF TUBE.
One relief tube is provided, located immediately
aft of the cabin door on the left side of the fuselage.
outlets, and to the floor outlets in the mission avion-
ics compartment. The environmental system is
shown in figure 2-21. placarded WSHLD W1
from both engines. Engine bleed air is combined
with ambient air in the heating and pressurization
flow control unit in each 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
Bleed airflow 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 defrost-
ing, pressurization and ventilation. The unit is fully
pneumatic except for an integral electric solenoid
firewall shutoff valve, controlled by the bleed air
switches located on the overhead control panel (fig.