Cessna 188 Series Service Manual page 355

MODEL 188 & T188 SERIES SERVICE MANUAL
16-71.
INSTRUMENT LIGHTING,
the switch controls the right hand light and the left
hand side controls the left hand light. A second
16-72. DESCRIPTION.
Instrument lighting is pro-
rocker type switch mounted on the panel controls
vided by 13 lamps mounted within the structure of the
power to the lamps on the top position and beginning
crash pad.
Nine of the lamps furnish lighting to the
with 18801425 the lower position controls power to
instrument panel through slots in the bottom of the
the automatic flagman. Lamps may be turned on in
crash pad. The other four lamps are directed up-
the retracted position and extended to any degree
ward to light the instrument cluster. Glare is ellmi-
desired.
Conversion from spray lights to wing tip
nated by a thermo-formed plastic shield mounted
turning lights is controlled by a switch on the control
atop the crash pad.
On aircraft serial 188-0318 and stick grip.
on, a light was added above the elevator trim tab con-
trol wheel.
The intensity of the instrument and clus- 16-82.
REMOVAL AND INSTALLATION.
ter lights is controlled by individual rheostats mount-
a. To remove lamp extend the light approximately
ed on the instrument panel. 60 degrees.
b.
Remove lamp retainer ring and remove lamp
16-73. REMOVAL AND INSTALLATION. (See
from inner canopy and disconnect the wires from
figure 16-8.)
the lamp.
a.
Thru aircraft serial 18800832 to gain access to
c.
To remove light assembly, support assembly
the instrument lamp socket assemblies, reach through
and remove screws securing assembly to retainer
the lightening holes in back of the instrument panel. band.
Beginning with serial 18800833 the crash pad is hinged.
d. Lower the light assembly from wing and place
b.
Pull light socket from the mounting support.
on a stand of suitable height.
c.
Remove the defective bulb and replace. e.
Tag and remove the wires from the terminal
block.
16-74.
TRANSISTORIZED LIGHT DIMMING. f. Remove the two screws securing the power unit
to the housing.
16-75. DESCRIPTION.. A remotely located two- g.
To install reverse the preceding steps.
circuit transistorized dimming assembly is installed
in the aircraft beginning with 1972 models.
One cir- 16-83. HOPPER QUANTITY LIGHT.
cuit controls the radio dial lights, lower instrument
lights, and trim light.
The other circuit controls the 16-84. DESCRIPTION.
A quantity light may be
map light, upper instrument lights and compass light.
mounted on the hopper to provide illumination of the
Power is supplied from the bus bar through a circuit
contents of the hopper so the pilot can determine the
breaker to the off-on switch, then to the dimming
amount of chemical remaining during night spraying
assembly.
Two rheostats on the instruments panel operation. The light is controlled by the interior
control the output of the dimming assembly and in
light switch and a dimming rheostat located on the
turn control the lighting.
left side of the instrument panel.
16-76. REMOVAL AND INSTALLATION. Figure 16-85.
COMPASS LIGHT.
16-8 may be used as a guide for removal and in-
stallation. 16-86. DESCRIPTION. The compass light is con-
tained within the individual unit. The intensity of the
16-77. WING TIP TURNING LIGHTS. compass light is controlled by the instrument cluster
rheostat mounted on the instrument panel.
16-78. DESCRIPTION.
The wing tip turning lights
are mounted in a fiber glass housing attached to the
16-87. STALL WARNING SYSTEM.
lower side of each wing tip. Lamps are 24-volt, 250
watt and controlled by a switch on the control stick 16-88.
DESCRIPTION. The stall warning circuit is
grip.
comprised of a warning horn and an actuating switch.
The switch is installed in the leading edge of the left
16-79. REMOVAL AND INSTALLATION.
(See wing and is actuated by airflow over the surface of
figure 16-7.) the wing. The switch will close as a stall condition
a. Remove screws securing shroud to wing tip and is approached, actuating the warning horn. The stall
remove shroud. warning unit should actuate the stall warning horn
b. Remove screws securing wiring to lamp contacts. approximately five to ten miles per hour above the
c.
Remove screws from lamp retainer ring and re- airplane stall speed. Install the lip of the warning
move lamp.
unit approximately one-sixteenth of an inch below the
d. Install new lamp and reassembly. centerline of the wing skin cutout.
Test fly the air-
16-80 FORWARD FACING SPRAY LIGHTS
craft to determine if the unit actuates the warning
16-80. FORWARD FACING SPRAY LIGHTS.
horn at the desired speed.
If the unit actuates the
6-81.
DECRIPTION The
forward facing
spray
warning horn at a speed in excess of ten miles per
16-81. DESCRIPTION. The forward facing spray mounting screws
lights consists of a retractable 600 watt, 24-volt and move stall speed. If the unit actuates the horn
lamp mounted on the under side of each wing at sta- ive miles per hour below stall speed, loosen the
tion 196.50. The lamps are extended or retracted mounting screws and move the unit up.
by a split-rocker type switch located on the left hand
side of the instrument panel.
The right hand side of
16-51