Cirrus DESIGN SR20 Information Manual page 324

Section 9
Supplements
Section 4 - Normal Procedures
Refer to Section 7 – Systems Description for a description of the
autopilot and altitude selector and their respective modes.
The pilot must properly monitor and control the engine power
to avoid stalling the airplane in autopilot altitude hold or
vertical speed modes.
Autopilot Pre-Flight Tests
1. Battery Master Switch ............................................................... ON
2. Avionics Power Switch .............................................................. ON
Note that all autopilot annunciators, except CWS, and TRIM
illuminate. After about 5 seconds, all lights will go out. When the
turn coordinator gyro has reached operational RPM, the RDY
annunciator will come on.
3. Heading Mode........................................................................TEST
a. Center the HDG bug under the lubber line on the HSI.
b. Momentarily press HDG button on autopilot Mode Selector.
Note that HDG light illuminates.
c. Then rotate HDG knob on the HSI to the left then right. Note
that control yokes follow movement of knob. Then return HDG
bug to lubber line.
4. Vertical Speed........................................................................TEST
a. Press VS button on autopilot programmer/computer. Note that
VS light illuminates VS+0.
b. Rotate the VS control knob to 500 FPM up (+5). After a short
delay, the control yoke will move aft.
c. Rotate the VS control knob to 500 FPM down (-5). After a
short delay, the control yoke will move forward.
5. Altitude Hold...........................................................................TEST
a. Depress ALT button on autopilot programmer/computer. Note
that ALT annunciator comes on, VS annunciator goes out, and
yoke does not move.
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• WARNING •
Cirrus Design
SR20
P/N 11934-S13
Revision 04: 08-15-07