Textron Cessna C172S PIM, Руководство по эксплуатации для пилотов

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CESSNA SECTION 7
MODEL 172S NAV III AIRPLANE AND SYSTEM DESCRIPTION
GFC 700 AFCS
U.S.
LIGHTING SYSTEMS
(Continued)
INTERIOR LIGHTING
(Continued)
Avionics panel lighting consists of the PFD and MFD bezel and display
lighting and audio panel lighting. Rotating the AVIONICS dimmer, found
on the switch panel in the DIMMING group, controls the lighting level.
Positioning the dimmer control in the off position, by rotating the control
knob fully counterclockwise causes the avionics displays to use internal
photocells to automatically control the lighting levels. This is the
recommended use of the avionics lighting for all day and lower lighting
levels where lighting of the avionics bezels and keys is not required. In
low to night lighting levels rotating the AVIONICS dimmer control
clockwise from the off position places all avionics lighting level control
to the AVIONICS dimmer control. This is the recommended use of
avionics lighting for night and low lighting conditions to allow the pilot
control of the avionics illumination levels as dark adaptation occurs.
Rotating the STBY IND dimmer control, found on the switch panel in
the DIMMING group, controls lighting of the standby airspeed indicator,
attitude indicator, altimeter and non-stabilized magnetic compass.
Rotating the dimmer control counterclockwise decreases light intensity
from the highest level to off.
Pilot's chart (map) lighting is accomplished by use of a rheostat and a
light assembly, both found on the lower surface of the pilot's control
wheel. The light provides downward illumination from the bottom of the
control wheel to the pilot's lap area. To operate the light, first turn the
NAV light switch ON, and then adjust the map light intensity using the
knurled rheostat knob. Rotating the dimmer clockwise (when facing up)
increases light intensity, and rotating the dimmer counterclockwise
decreases light intensity.
Regardless of the light system in question, the most probable cause of
a light failure is a burned out bulb. However, in the event any lighting
systems fails to come on, check the appropriate circuit breaker. For
interior lighting failure check the PANEL LTS circuit breaker, and for
exterior lighting failure check the associated light function circuit
breaker (i.e. landing light, LAND LT circuit breaker). If the circuit
breaker has opened, and there is no obvious indication of a short circuit
(smoke or odor), turn the affected lights OFF, reset the circuit breaker,
and turn the lights ON again. If the circuit breaker opens again, do not
reset until maintenance has been performed.
172SPHBUS-02 7-61