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channels). The tuning controls are located at the left side of the GNC
420 front panel. Frequency tuning is accomplished by rotating the
large and small concentric knobs to select a standby frequency and
then transferring the frequency to the active window. The COM
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P/N 13772-104 7 of 8
Cirrus Design Section 9
SR22 Supplements
frequency display window is at the upper left corner of the GNC 420
display. Auto-tuning can be accomplished by entering a frequency
from a menu. The COM 2 antenna is located below the cabin on the
airplane centerline. 28 VDC for transceiver operating is controlled
through the Avionics Master Switch and supplied through the 7.5-amp
COM2 circuit breaker on the Avionics Non-Essential Bus.
TERRAIN Interface*
• Note •
*TERRAIN functionality is a standard feature found in GNS
430 units with main software version 5.01 or above and valid
terrain and obstacle databases installed.
Garmin TERRAIN is a terrain awareness system incorporated into
GNS 430 units to increase situational awareness and aid in reducing
controlled flight into terrain. The TERRAIN function displays altitudes
of terrain and obstructions relative to the aircraft’s altitude and are
advisory in nature only. Individual obstructions may be shown if
available in the database, however, not all obstructions may be
available in the database and data may be inaccurate. TERRAIN
information should be used as an aid to visual acquisition and not use
to navigate or maneuver to avoid terrain.
For for a more detailed description of the TERRAIN function, refer to
the Garmin GNS 430 Pilot's Guide and Reference, P/N 190-00140-00,
Revision H dated May 2006 or later revision.
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8 of 8 P/N 13772-104
Section 9 Cirrus Design
Supplements SR22
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Intentionally Left Blank
P/N 13772-108 1 of 24
Cirrus Design Section 9
SR22 Supplements
Pilot’s Operating Handbook and
FAA Approved Airplane Flight Manual
Supplement
For
S-Tec System 55X Autopilot w/
Altitude Selector/Alerter
When the S-Tec System Fifty Five X (55X) Autopilot with Altitude
Selector / Alerter is installed in the Cirrus Design SR22, this
Supplement is applicable and must be inserted in the Supplements
Section (Section 9) of the Cirrus Design SR22 Pilot's Operating
Handbook. This document must be carried in the airplane at all times.
Information in this supplement adds to, supersedes, or deletes
information in the basic SR22 Pilot's Operating Handbook.
• Note •
This POH Supplement Revision dated Revision 5: 08-15-07,
supersedes and replaces Revision 4 of this supplement dated
07-18-05.
Revision 5: 08-15-07
2 of 24 P/N 13772-108
Section 9 Cirrus Design
Supplements SR22
Section 1 - General
This airplane is equipped with an S-TEC System 55X Autopilot. The
System 55X autopilot is a two-axis autopilot system. The system
consists of a flight guidance programmer/computer, altitude encoder,
altitude selector / alerter, turn coordinator, and HSI. Mode selection
and vertical speed selection is made on the programmer/computer
panel. A button on each control yoke handle may be used to
disengage the autopilot. The autopilot makes roll changes through the
aileron trim motor and spring cartridge and makes pitch changes for
altitude hold through the elevator trim motor. The SR22 installation of
the S-Tec System 55X Autopilot features:
• Heading Hold and Command;
• NAV/LOC/GPS/GS tracking, high and low sensitivity, and
automatic 45° course intercept;
• GPS Steering (GPSS);
• Altitude Pre-select, Hold and Command, Altitude display, and
baro correction;
• Altitude and Decision Height (DH) alert; and
• Vertical Speed Hold and Command.
Refer to S-Tec System Fifty-Five X Autopilot Pilot’s Operating
Handbook (POH) Serials 0002 thru 0434; P/N 87109 dated 8
November 2000 or later OR Serials 0435 and subsequent; P/N 87247
original release or later, for full operational procedures and description
of implemented modes. The System 55X POH also contains detailed
procedures for accomplishing GPS & VOR course tracking, front
course and back course localizer approaches, and glideslope tracking.
Refer to S-Tec Altitude Selector / Alerter Pilot’s Operating Handbook
(POH) P/N 8716 or P/N 87110 (original issue or later) for full
operational procedures and detailed description of operational modes
of the Altitude Selector / Alerter.
• Note •
The SR22 implementation of the System 55X Autopilot does
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