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Pressing the VFR key sets the transponder to the pre-programmed
VFR code selected in the configuration mode (factory set to 1200).
Pressing the VFR key a second time will restore the previous
identification code.
FUNC Key
Pressing the FUNC key changes the data shown on the right side of
the display. Pressing the FUNC key a second time will cycle the
display to the next data. Displayed data includes Pressure Altitude,
Flight Time, Count Up Timer, Count Down Timer, Contrast, and
Display Brightness.
PRESSURE ALT - Displays pressure altitude in feet. An arrow to the
right of the altitude indicates that the airplane is climbing or
descending.
FLIGHT TIME - Displays the flight time. The timer receives
groundspeed from GPS1. Flight time starts when the groundspeed
reaches 35 knots on takeoff and pauses when the groundspeed
descends below 35 knots on landing.
COUNT UP TIMER - The count up timer is controlled by the START /
STOP key. Pressing the CLR key zeros the display.
Original: 12-26-00
8 of 8 P/N 11934-S12
Section 9 Cirrus Design
Supplements SR20
COUNT DOWN TIMER - The count down timer is controlled by the
START / STOP key. The CRSR and “0 - 9” keys are used to set the
initial time. Pressing the CLR key resets the timer to the initial value.
CONTRAST - Allows adjustment of display contrast. When
CONTRAST is selected, pressing the “8” key reduces contrast and
pressing “9” increases contrast.
DISPLAY - The display function is not available in this installation.
Display brightness is automatically controlled through a photocell in
the front panel.
Original: 12-26-00
P/N 11934-S13 1 of 16
Cirrus Design Section 9
SR20 Supplements
Pilot’s Operating Handbook and
FAA Approved Airplane Flight Manual
Supplement
for
S-Tec System 55X Autopilot
When the S-Tec System Fifty Five X (55X) Autopilot is installed in the
Cirrus Design SR20, this Supplement is applicable and must be
inserted in the Supplements Section (Section 9) of the Cirrus Design
SR20 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 SR20 Pilot’s Operating
Handbook.
• Note •
This POH Supplement Revision dated Revision 04: 08-15-07,
supersedes and replaces Revision 03 of this supplement
dated 07-18-05..
Revision 04: 08-15-07
2 of 16 P/N 11934-S13
Section 9 Cirrus Design
Supplements SR20
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 SR20 installation of
the S-Tec System 55X Autopilot features:
• Heading Hold and Command;
• NAV/LOC/GS tracking, high and low sensitivity, GPSS roll
steering, and automatic 45° course intercept;
• Altitude Hold and Command; and
• Vertical Speed Hold and Command.
Refer to S-Tec System Fifty-Five X Autopilot Pilot’s Operating
Handbook (POH): Serials 1005 thru 1336; P/N 87109 dated 8
November 2000 or later OR Serials 1337 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.
• Note •
The SR20 implementation of the System 55X Autopilot does
not utilize the optional remote annunciator, roll servo, and
optional trim servo. Therefore, all references to these items in
the S-Tec System 55X POH shall be disregarded. Additionally,
this installation does not utilize a CWS (Control Wheel
Steering) switch or an AUTOPILOT MASTER switch.
This installation utilizes the airplane’s pitch and roll trim
actuators to affect steering changes. Therefore, the automatic
trim function of the System 55X is not implemented. Disregard
all references in the S-Tec System 55X POH to this feature.
Revision 04: 08-15-07
P/N 11934-S13 3 of 16
　
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