GI 275 Part 23 AML STC
190-02446-12 Rev. 4
Airplane Flight Manual Supplement
Page 59 of 70
7.15.1
Navigation Data for Autopilots
The GI 275 can provide course and heading data to the autopilot based on the
data selected for display on the HSI. For aircraft equipped with multiple
GPS/NAV systems, the HSI can act as a selection hub for the autopilot’s NAV
mode. Alternatively, the NAV mode can be selected using the NAV Options
menu on the ADI. The GI 275 may also provide GPS Steering (GPSS) data.
Not all autopilot systems are approved for providing vertical guidance on GPS-
based approaches; consult the AFMS for the autopilot and/or GPS system.
If the installation has pilot and copilot HSIs, control of navigation course,
heading, or altitude data affecting the autopilot from the co-pilot side can only
be made if the systems are synchronized with each other.
If the autopilot can receive GPSS Roll Steering, the data is transmitted via a
digital communications bus from the GI 275 to the autopilot. The HSI receives
this data from the GPS. In dual GPS installations, the HSI sends Roll Steering
information from the selected GPS source.
For autopilots which are not GPSS Roll Steering capable, the GI 275 can
convert GPSS turn commands into a heading error signal for the autopilot.
When the autopilot is operated in HDG mode and GPSS is selected as the GI
275’s heading source, the autopilot will fly the turn commands from the GPS
navigator selected on the GI 275. If an autopilot is interfaced to the GI 275
which supports GPS steering (GPSS), a menu selection is provided in the ADI
(Menu → Options → NAV Options→ HDG to change the autopilot heading
reference between GPSS and selected heading. When GPSS is selected, the
heading bug will become hollow and the selected heading display will
annunciate “GPSS” with an icon of a crossed out heading bug. The heading bug
may still be adjusted by the pilot as a visual reference without affecting GPSS or
its steering commands to the autopilot.
If the GPSS data is invalid (for example, if there is no active GPS leg) or the
selected HSI source on HSI / ADI 1 is not GPS, the annunciated GPSS text will
be yellow and a wings level command will be sent to the autopilot.
GPSS commands are not available when the CDI source is a VOR or LOC.
Summary of Contents for M20M
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Page 12: ...SECTION I GENERAL MOONEY MODEL M20M FIGURE 1 1 THREE VIEW ISSUED 3 90...
Page 60: ...SECTION IV NORMAL PROCEDURES MOONEY MODEL M20M ISSUED 3 90...
Page 78: ...SECTION V PERFORMANCE MOONEY MODEL M20M ISSUED 3 90...
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Page 111: ...MOONEY MODEL M20M SECTION VI WEIGHT AND BALANCE M2OM WT BAL RECORD ISSUED 3 90 6 5...
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Page 178: ...SECTION IX SUPPLEMENTAL DATA SUPPLEMENT INSERTED MOONEY MODEL M20M DATE ISSUED 3 90...
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