Cirrus SR22 Pilot Operating Handbook page 272

Section 7
Airplane Description
autopilot mode, full guidance is provided, including smooth transitions
to altitude and heading captures. If not in an active autopilot mode
(i.e., "hand-flying"), there is no guidance other than the position of the
appropriate bugs, as set by the pilot. A button on each control yoke
handle may be used to disengage the autopilot.
The reference bugs' status, autopilot annunciations, and flight director
steering command bars (if installed) will indicate when Entegra is
coupled with the autopilot. A solid magenta Heading, Altitude, or VSI
(55X only) bug indicates that the function is currently coupled to an
active mode of the autopilot. A hollow magenta bug indicates that the
function is not currently coupled to the autopilot in an active mode. In
other words, a hollow bug indicates manual or "hand-flying" status.
In flight director equipped aircraft, when a vertical mode of the
autopilot is being used, a set of flight director command bars will
indicate the required steering of the aircraft to achieve the commanded
tracking from the autopilot. In autopilot mode, "AP" will be in the
autopilot annunciation field, the command bars will be visible and
magenta and the aircraft should track the bars.
In flight director only mode, "FD" will be displayed in the autopilot
annunciation field, the command bars will be visible and green, and
the pilot is expected to actuate the flight controls as required to track
the bars.
One of the horizontal modes (HDG, NAV, GPSS) must be
engaged on the autopilot control interface before a vertical
mode can be used.
When HDG mode is engaged, rotation of the heading bug
greater than 180 degrees may result in a reversal of turn
direction.
The following six modes of the System 55X are supported by the
Entegra PFD:
• ALT (Altitude Hold) Mode
• VS (Vertical Speed) Mode
• Altitude Capture Mode
• HDG (Heading Capture/Hold Mode)
7-98
• Note •
Cirrus Design
SR22
P/N 13772-001
Revision A10