Landing And Taxi Lights (Cowl Mounted) (Dual); Description; Removal And Installation; Instrument. Dome And Courtesy - Cessna 1969-1976 172 Series Service Manual

NOTE
A screwdriver may be inserted through
the lamp opening for screw adjustments.
Adjustments may also be made if the cowling is re-
moved from the aircraft.
a. Remove the cowl. (As outlined in Section 11).
When removing the cowling, ensure the
landing and taxi wiring connection
is
disconnected before removing the bottom
cowling. The connector is positioned a t
the aft end of the cowling on the lower
right side.
b. Make screw adjustments
as
desired or if factory
adjustment is desired the screws should be turned
until they bottom out against the bracket.
16-60. ADJUSTMENT OF LANDING AND TAXI
LIGHT (COWL MOUNTED) (BEGINNING WITH
AIRCRAFT SERIALS 17259738 AND F17200805 AND
(Refer to figure 16-6.) Adjustment of the landing and
taxi light is pre-set a t the factory, however changes
to this adjustment may be made as desired by adding
o r subtracting from the number of washers (4).
maximum of two washers may be used.
16-60A.
MOUNTED, OPTIONAL).
WHEN MODIFIED IN ACCORDANCE WITH SK172-38)
A
LANDING AND TAXI LIGHTS (DUAL, COWL
16-60B. DESCRIPTION. Optional, dual, cowl mount-
ed landing and taxi lights may be installed. The left
hand light is used for taxi and the right hand for land-
ing, Two rocker type switches on the pilots switch
panel control the lights. A 20 amp circuit breaker is
installed to protect the system.
16-6OC. REMOVAL AND INSTALLATION. (Refer to
figure 16-6. )
a.
Remove screws (1) and pull bracket assembly (2)
from nose cap to gain
access
to electrical leads.
b. Disconnect electrical leads from lamps making
s u r e switches are off and leads do not short out.
c. Remove screws (9) from plate (7) and remove
lamp assembly from bracket (2). If left hand (taxi)
light
is
being removed, note position of s p a c e r s (3)
and
(11) f o r reinstallation.
assemble lamp assembly.
I
d. Remove screws (10) from bracket (4) to dis-
e.
Install new lamp and reassemble.
16-61. NAVIGATION LIGHTS.
16-62. DESCRIPTION. The navigation lights a r e lo-
cated on each wing tip and the top edge
of
the vertical
fin. The lights
are
controlled by
a
pull type switch
located on the instrument panel.
16-63. REMOVAL AND INSTALLATION. F o r re-
moval and installation of navigation lights refer to
figure 16-7.
16-64. ANTI-COLLISION STROBE LIGHTS.
16-65. DESCRIPTION. A white strobe light is in-
stalled on each wing tip and lights are vibration r e -
sistant and operate on the principle of
a
capacitor
discharge into a xenon tube, producing an extremely
high intensity flash. Energy is supplied to the strobe
lights from a power supply, mounted just aft of the
baggage curtain, on the left side of the a i r c r a f t above
the battery box thru 1972 Models, and one on each wing
tip r i b beginning with 1973 Models.
16-66. REMOVAL AND INSTALLATION. U s e figure
16-7
as a
guide for removal and installations of the
anti-collision strobe light components.
(WARNING)
This anti-collision system is a high voltage
device.
sembly while in operation. Wait a t least 5
minutes after turning off power before
starting work.
Do not remove o r touch tube
as-
16-67. FLASHING BEACON.
16-68. DESCRIPTION. The flashing beacon light is
attached to a thermoformed plastic mounting on the
vertical fin. The flashing beacon is an iodine-vapor
lamp electrically switched by a solid-state flasher
assembly. The flasher assembly is located in the
aft
section of the tailcone. The switching frequency of
the flasher assembly operates the beacon a t approxi-
mately 45 flashes per minute.
16-69. REMOVAL AND INSTALLATION. For re-
moval and installation of the flashing beacon r e f e r to
figure 16-8.
16-70. INSTRUMENT, DOME AND COURTESY
LIGHTS.
16-71. DESCRIPTION, The instrument and dome
lights are mounted in an overhead console located on
the top of the cabin and provide non-glare instrument
flood lighting and cabin lighting. The instrument
flood light consists of a r e d lens and a single bulb.
On models thru 1970, instrument flood lighting
i s
controlled by
a
dimming rheostat mounted on the
right side of the overhead console. On 1971 and on
models, instrument flood lighting is controlled by
a
rheostat mounted on the lower, left hand portion of
the instrument panel. The courtesy lights a r e mount-
ed in the under side of each wing and consist of a lens
and single bulb, lighting is controlled by the dome
light switch.
16-22B Change 3