Lighting Systems; Exterior Lighting; Interior Lighting - Cessna SKYHAWK 172M 1976 Pilot Operating Handbook

SECTION 7
AIRPLANE & SYSTEMS DESCRIPTIONS
CESSNA
MODEL 172M
The battery and external power circuits have been designed to com-
pletely eliminate the need to "jumper" across the battery contactor to
close it for charging a completely "dead" battery. A special fused circuit
in the external power system supplies the needed "jumper" across the con-
tacts so that with a "dead" battery and an external power source applied,
turning on the master switch will close the battery contact or.
LIGHTING SYSTEMS
EXTERIOR LIGHTING
Conventional navigation lights are located on the wing tips and top of
the rudder. A single landing light or dual landing/taxi lights are installed
in the cowl nose cap, and a flashing beacon is mounted on top of the verti-
cal fin. Additional lighting is available and includes a strobe light on each
wing tip and two courtesy lights, one under each wing, just outboard of the
cabin door. The courtesy lights are operated by the dome light switch
0-:1.
the overhead console. All exterior lights, except the courtesy lights , are
controlled by rocker type switches on the left switch and control panel. The
switches are ON in the up position and OFF in the down position.
The flashing beacon should not be used when flying through clouds or
overcast; the flashing light reflected from water droplets or particles in
the atmosphere, particularly at night, can produce vertigo and loss of
orientation.
The two high intensity strobe lights will enhance anti- collision protec-
tion. However, the lights should be turned off when taxiing in the vicinity
of other aircraft, or during night flight through clouds, fog or haze.
INTERIOR LIGHTING
Instrument and control panel lighting is provided by flood lighting, in-
tegral lighting, and post lighting (if installed). Two concentric rheostat
control knobs below the engine controls, labeled PANEL LT and RADIO LT,
control intensity of the instrument and control panel lighting. A slide-type
switch
(if
installed) on the overhead console, labeled PANEL LTS, is used
to select flood lighting in the FLOOD position, post lighting in the POST
position, or a combination of post and flood lighting in the BOTH position.
Instrument and control panel flood lighting consists of a single red
flood light in the forward part of the overhead console. To use the flood
lighting, rotate the PANEL LT rheostat control knob clockwise to the de-
sired intensity.
The instrument panel may be equipped with post lights which are
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