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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.
• Note •
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)
June 2007
Information Manual 7-91
Cirrus Design Section 7
SR22 Airplane Description
• NAV Mode
• GPSS (GPS Steering) Mode
The following three modes of the System 55SR are supported by the
Entegra PFD:
• ALT (Altitude Hold) Mode
• HDG (Heading Capture/Hold Mode)
• NAV Mode
28 VDC for autopilot and altitude selector/alerter is supplied through
the 5-amp AUTOPILOT circuit breaker on the Essential Bus.
Refer to S-Tec System Fifty-Five X Autopilot Pilot's Operating
Handbook, P/N 87109 dated 8 November 2000 or later, and the
applicable POH supplement for a more complete description of the
autopilot, its operating modes, and additional detailed operating
procedures.
GPS Navigation
The Jeppesen Navigation Database provides access to data on
Airports, Approaches, Standard Instrument Departures (SIDs),
Standard Terminal Arrivals (STARs), VORs, NDBs, Intersections,
Minimum Safe Altitudes, Controlled Airspace Advisories and
Frequencies. North American and International databases are
available. Database information is provided on a card that can be
inserted into the card slot on the GPS unit. Subscription information is
provided in a subscription packet provided with each system.
Serials with Avionics Configuration A - 0002 through 1601, 1603
through 1643 and 1645 through 1662 without PFD:
The airplane is equipped with two GPS navigators. The Garmin GNS
430 is designated GPS 1 and the Garmin GNS 420 is designated GPS
2. Both Garmin GPS navigators are IFR certified. The primary unit,
designated GPS 1, is coupled to the airplane’s HSI, Autopilot, and
multifunction display. The secondary unit, designated GPS 2, is
coupled to the airplane’s HSI.
The GPS navigators are capable of providing IFR enroute, terminal,
and approach navigation with position accuracies better than 15
meters. Each GPS navigator utilizes the Global Positioning System
(GPS) satellite network to derive the airplane’s position (latitude,
June 2007
7-92 Information Manual
Section 7 Cirrus Design
Airplane Description SR22
longitude, and altitude) and the altitude encoder to enhance the
altitude calculation.
The GPS1 antenna is located above the headliner along the airplane
centerline. The GPS2 antenna is located below the glareshield and
behind the MFD. All GPS navigator controls and functions are
accessible through the GPS receiver units’ front control panels located
in the center console. The panels include function keys, power
switches, MSG and NAV status annunciators, a color LCD display
(GNS 430), two concentric selector knobs on each panel, and a
Jeppesen NavData card slot in each panel. The displays are daylight
　
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