Textron Cessna 172S Skyhawk SP, Information Manual

Page: 421 / 491

SECTION 9
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SUPPLEMENTS
SUPPLEMENT 19
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FAA APPROVED
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CESSNA
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MODEL 172S
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A
WARNING
TURN. ANTICIPATION IS AUTOMATICALLY
DISABLED FOR FAF WAYPOINTS AND THOSE
USED 'EXCLUSIVELY IN DP/STARS WHERE
OVERFLIGHT IS REQUIRED. FOR WAYPOINTS
SHARED BETWEEN DP/STARS AND.PUBLISHED
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EN ROUTE SEGMENTS (REQUIRING
OVERFLIGHT IN THE DP/STARS), PROPER
SELECTION ON THE PRESENTED WAY POINT
PAGE IS NECESSARY TO PROVIDE ADEQUATE
ROUTE PROTECTION ON THE DP/STARS.
3. GPS APPROACH (GPS, APR) SWITCH
co
Pressing the GPS
APPROACH switch manually selects or disarms the approach
ARM mod", and also cancels the approach ACTV mode. after
being automatically
engaged by the KLN 94 GPS system.
The white background color of the GPS. APPROACH
annunciator makes it visible in daylight
4. ARM ANNUNCIATOR LIGHT -- ARM annunciator will
illuminate when the KLN 94 GPS system automatically selects
the approach ARM mode or when the approach ARM mode is
manually selected. The approach ARM mode will be
automatically selected when the airplane is within 30 NM of an
airport, and an approach is loaded in the flight plan for that
airport.
The approach ARM mode can manually be selected
at a greater distance than 30 NM from the airport by pressing
the GPS APPROACH switch; however, this will not change the
COl scale until the airplane reaches the 30 NM point. The
approach ARM mode can also be disarmed by pressing the
GPS APPROACH switch.
5. ACTIVE (ACTV) ANNUNCIATOR LIGHT
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ACTV annunciator
will illuminate when the KLN 94 GPS system automatically
engages the approach ACTV mode (the ACTVmode can only
be engaged by the KLN 94 GPS system which is automatic).
To
cancel the approach ACTV mode, press the GPS
APPROACH switch; this will change the mode to the approach
ARM mode and illuminate the ARM annunciator.
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Figure 1. GPS Annunciator/Switch
(Serials 172S8372 thru 172S8703) (Sheet 2 of 3)
S19-8
Revision 4