External Taws - Garmin GI 275 Installation Manual

[5] For interface approval with GFC 500, refer to GFC 500 STC SA01866WI. The GI 275 hardware
must be MOD 1 or later.
[6] The GI 275 is capable of displaying mode annunciations for the GFC 500 interface only.
Annunciations for the GFC 600 interface are not provided on the GI 275.
[7] The Century II/IIB autopilot is equivalent to the Piper AutoControl III and IIIB autopilots, and the
Century III autopilot is equivalent to the Piper Altimatic III, IIIB, and IIIC autopilots.Refer to
Appendix Section C.8 for specific autopilot interface capabilities and version-specific limitations.
3.3.9.1 Autopilot Turn Coordinator
A turn coordinator that interfaces to the existing autopilot must be retained. If the turn coordinator is
relocated, the indicator incline must remain the same; otherwise, the autopilot performance will be
incorrect. Refer to the turn coordinator installation manual for details. In some circumstances, the turn
coordinator may have to be blind-mounted, which requires separate installation approval.

3.3.10 External TAWS

Only one TAWS that generates aural and visual annunciations is permitted in the aircraft. If the aircraft has
a TAWS installed, and SVT is enabled on the pilot's Primary ADI, the GI 275 must be configured to
prevent conflicting aural and visual annunciations. Combinations of external TAWS sources, GI 275
settings, and the resulting alert sources are shown in Table 3-20.
The GI 275 provides the terrain alerting from a GTN 6XX/7XX, GTN Xi, or GNS 400W/500W; however,
the GI 275 does not provide all of the necessary annunciations and therefore the GTN or GNS may still
require an external TAWS annunciator panel.
Aircraft Setup
Terrain/
External
TAWS
TAWS SVT
Mode
System
Enabled External
GTN
TAWS [1]
Disabled External
Enabled External
GNS
TAWS [1]
Disabled External
Enabled External
Non-
Garmin
TAWS
Disabled External
Notes:
[1] If GNS/GTN TAWS becomes unavailable, the display will revert to Terrain Proximity.
[2] The Terrain Mode is automatically configured to External when any External TAWS setting
is configured to anything other than Not Installed.
190-02246-10
Rev. 11
Table 3-20 External TAWS Setup with GI 275
PFD
External
Annunciation
TAWS
Text Source
[2]
Installed
GTN TAWS
(HSDB)
Installed
GTN TAWS
(HSDB)
Installed
GNS TAWS
(MapMX)
Installed
GNS TAWS
(MapMX)
Installed
None
(Other)
Installed
None
(Other)
LRU Alert Source
PFD SVT MFD Map
Terrain & Impact Area/
Obstacle Pop-up
Shading Alerts
GTN TAWS GTN TAWS
N/A GTN TAWS
None None
N/A None
None None
N/A None
GI 275 Part 23 AML STC Installation Manual
MFD Aural
Terrain Callouts
Proximity from
Shading LRU
Terrain GTN
page TAWS
Terrain GTN
page TAWS
GNS
Terrain
page TAWS
GNS
Terrain
page TAWS
Non-
Terrain
Garmin
page
TAWS
Non-
Terrain
Garmin
page
TAWS
Page 3-23