Table 3-12 Gi 275 Standby Adi Restrictions Per System; Standby Instruments - Garmin GI 275 Installation Manual

3.2.2

Standby Instruments

Installations of a GI 275 in aircraft approved for IFR operations require standby attitude, airspeed, and
altimeter instruments. The existing pneumatic instruments can be retained for use as standby instruments;
however, they must be located next to the pilot's PFD. Standby instruments are not required for aircraft
limited to VFR-only operations. Refer to Section 2.1.3 for additional Standby and Primary ADI guidance.
The existing non-stabilized magnetic compass must be retained. The magnetic compass must be
re-calibrated once the GI 275 is installed and configured.
GI 275 standby instruments must have a backup battery unless powered by an electrical source
independent of the aircraft's primary electrical power source. Additionally, a display backup switch may be
required to be installed if the GI 275 is configured as an HSI/Standby ADI or a MFD/Standby ADI. Refer
to Table 3-12 and Table 3-13 for switch requirements.
Table 3-12 and Table 3-13 outline aircraft class restrictions and Instrument Type configurations of the
standby display when the GI 275 is used as a standby for various systems. MFD pages are not configurable
when the indicator is configured as ADI on the Unit Configuration page unless the Standby selection is
enabled.
Per this STC, the GI 275 is approved as a standby to the G500/G600 and G500/G600 TXi systems.
CAUTION
Some installations do not permit MFD pages to be displayed on the standby. Refer to Table 3-12.

Table 3-12 GI 275 Standby ADI Restrictions per System

System
GI 275
G500/G600 TXi
w/GSU 75 or GRS 79 & GDC 72
or internal ADAHRS
G500/G600 TXi
w/GRS 77 & GDC 74
G500/G600 (GDU 620)
GX000
T -P
HIRD ARTY
Notes:
[1] Refer to Section 1 for aircraft class designations.
[2] Refer to Section 5.3.4 for Instrument Type configuration instructions. MFD pages are only
configurable when the Standby selection is enabled.
[3] The display backup switch is only required when MFD pages are configured for normal operation.
[4] An "ADI Only" GI 275 interfaced with the G500/G600 TXi system must be configured with the
Standby button enabled, but all MFD pages must be disabled, with only the ADI page configured.
Refer to Section 5.3.4 and Section 5.5.3.
190-02246-10
Rev. 11
Aircraft Class Instrument Function
Restriction [1]
C I & II MFD/S
LASS
C III
LASS
C I & II MFD/S
LASS
C III & IV
LASS
C I - IV
LASS
C I - IV
LASS
C I - IV
LASS
C I - IV
LASS
GI 275 Part 23 AML STC Installation Manual
Display Backup Switch
[2]
ADI
TANDBY
ADI O
NLY
ADI
TANDBY
ADI O [4]
NLY
ADI O [4]
NLY
ADI O
NLY
ADI O
NLY
ADI O
NLY
Required [3]
Y
ES
N
O
Y
ES
N
O
N
O
N
O
N
O
N
O
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