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configuration.
Section 3 - Emergency Procedures
Autopilot Malfunction
Refer to Electric Trim/Autopilot Failure procedure in the basic
Handbook. Do not reengage the autopilot until the malfunction has
been identified and corrected.
The autopilot may be disconnected by:
1. Pressing and holding the Mode Selector Knob on the Turn
Coordinator for approximately 2 seconds.
2. Pressing the Trim Switch on the control yoke handle.
3. Pulling the AUTOPILOT circuit breaker on the Main Bus 1.
Altitude losses during an autopilot malfunction and recovery were:
Configuration Bank Angle Altitude Loss
Climb 30° None
Cruise 55° 100 ft
Descent 55° 120 ft
Maneuvering 10° None
Approach 0° 20 ft
Revision 1: 12-07-04
4 of 8 P/N 11934-S06
Section 9 Cirrus Design
Supplements SR20
Section 4 - Normal Procedures
Refer to Section 7 – Systems Description for a description of the
autopilot and its modes.
Autopilot Pre-Flight Test
1. Battery Master Switch ............................................................... ON
2. Avionics Power Switch .............................................................. ON
Note that all autopilot annunciators, except TRIM UP and DN,
illuminate. After a few seconds all lights will go out. When the turn
coordinator gyro has reached operational RPM, the green RDY
light will illuminate.
3. ST (Stabilizer) Mode ..............................................................TEST
a. Momentarily depress Autopilot Mode Selector, and note that
ST (Stabilizer) light illuminates.
b. Then rotate Mode Selector Knob left then right. Note that
control yokes follow movement of knob.
4. Heading Mode........................................................................TEST
a. Center the HDG bug under the lubber line on the HSI or DG.
b. Momentarily depress Autopilot Mode Selector, and note that
HD (Heading) light illuminates.
c. Then rotate HDG knob on the DG or HSI to the left then right.
Note that control yokes follow movement of knob. Then return
HDG bug to lubber line.
5. Overpower Test:
a. Grasp control yoke and input left and then right aileron to
overpower autopilot. Overpower action should be smooth with
no noise or jerky feel.
6. Radio Check:
a. Turn on NAV1 radio, with a valid NAV signal, select VLOC for
display on CDI or HSI.
b. Use Autopilot Mode Selector to engage TRK LO mode and
move OBS so that VOR deviation needle moves left or right.
Note that control yokes follow direction of needle movement.
Revision 1: 12-07-04
P/N 11934-S06 5 of 8
Cirrus Design Section 9
SR20 Supplements
c. Use Autopilot Mode Selector to engage TRK HI mode and
move OBS so that VOR deviation needle moves left or right.
Note that control yokes follow direction of needle movement
with more authority than in TRK LO mode.
7. Autopilot Disconnect Tests:
a. Press and hold Autopilot Mode Selector for approximately 2
seconds. Note that the autopilot disengages. Move control
yoke to confirm that roll control is free with no control
restriction or binding.
b. Momentarily depress Autopilot Mode Selector. Note that
autopilot engages in ST (Stabilizer) mode.
c. Press Pilot Trim Switch (control yoke). Note that the autopilot
disengages. Move control yoke to confirm that roll control is
free with no control restriction or binding.
d. Repeat steps b. and c. using Copilot Trim Switch.
Inflight Procedures
1. RDY Light.....................................................................CHECK ON
2. Trim airplane for existing flight conditions.
3. Center Autopilot Mode Selector Knob and then depress once to
enter ST (Stabilizer) mode.
4. Rotate Autopilot Mode Selector Knob as desired to setup level or
turning flight.
Heading Mode
1. Begin by selecting a heading on the DG or HSI within 5° of the
current airplane heading.
• Note •
The airplane should be within 5° of the selected heading when
HD is selected. If airplane is more than 5° off the selected
heading the autopilot will turn the airplane towards the course
but may not capture and track it.
2. Use Autopilot Mode Selector to select HD mode.
3. Use DG or HSI HDG knob to make heading changes as desired.
Revision 1: 12-07-04
6 of 8 P/N 11934-S06
Section 9 Cirrus Design
Supplements SR20
GPS Tracking and GPS Approach
1. Begin with a reliable GPS signal and CDI course needle centered,
with airplane on the suggested heading to the waypoint.
• Note •
The airplane must be within 5° of the desired course when
　
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