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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.
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8 of 8 P/N 13772-104
Section 9 Cirrus Design
Supplements SR22
Revision 1: 05-25-05
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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 4: 07-18-05
supersedes and replaces Revision 3 of this supplement dated
12-07-04.
Revision 4: 07-18-05
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), P/N 87109 dated 8 November 2000 or later revision
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 (no revision 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
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,
Draft
P/N 13772-108 3 of 24
Cirrus Design Section 9
SR22 Supplements
this installation does not utilize a CWS (Control Wheel
Steering) switch or an AUTOPILOT MASTER switch.
• Note •
This installation utilizes the airplane’s roll trim actuator 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.
Roll information is displayed on the HSI. Autopilot Flight
Director is not implemented in this installation.
Section 2 - Limitations
1. Autopilot operation is prohibited above 185 KIAS.
2. The autopilot must not be engaged for takeoff or landing.
3. The autopilot must be disengaged for missed approach, goaround,
and balked landing.
4. Flaps must be set to 50% for autopilot operation in Altitude Hold at
airspeeds below 95 KIAS.
5. Flap deflection is limited to 50% during autopilot operations.
6. The autopilot must be disconnected in moderate or severe
turbulence.
7. Minimum engage height for the autopilot is 400 ft AGL.
• WARNING •
Autopilot may not be able to maintain all selectable vertical
speeds. Selecting a vertical speed that exceeds the aircraft’s
available performance may cause the aircraft to stall.
8. Minimum speed with the autopilot engaged is 1.2Vs for the given
configuration.
　
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