Garmin GI 275 User manual

190-02246-10 October 2021 Revision 11
GI 275
Part 23 AML STC
Installation Manual

190-02246-10 GI 275 Part 23 AML STC Installation Manual
Rev. 11 Page i
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190-02246-10 GI 275 Part 23 AML STC Installation Manual
Rev. 11 Page ii
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Software License Notification
AES Encryption
The product may include AES file encryption software, © 2002 DR. Brian Gladman, subject to the following license:
The free distribution and use of this software in both source and binary form is allowed (with or without changes)
provided:
• Distributions of this source code include the above copyright notice, this list of conditions, and the following
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190-02246-10 GI 275 Part 23 AML STC Installation Manual
Rev. 11 Page iii
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190-02246-10 GI 275 Part 23 AML STC Installation Manual
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190-02246-10 GI 275 Part 23 AML STC Installation Manual
Rev. 11 Page v
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190-02246-10 GI 275 Part 23 AML STC Installation Manual
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RECORD OF REVISIONS
DESCRIPTION OF CURRENT REVISION CHANGES
Rev Revision Date Description
9 05/10/21 Updated software to v2.30. Added transponder control. Added new
GSB 15 USB-C part numbers.
10 07/20/21 Updated software to v2.40. Corrected omission of GTN Xi interface.
11 10/06/21 Minor change to update software to v2.42 and minor corrections.
Section Description
1.2.2.2 Updated wording of Note 6 regarding AHRS aiding in Figure 1-3 GI 275 Horizontal
Situation Indicator.
2.1.5 Removed EIS limitation on turbocharged engines with a differential fuel pressure sensor.
3.1.1 Added GI 275 NVIS models to Table 3-1 GI 275 Units.
4.4.1 Added GI 275 NVIS part numbers to Table 4-2 GI 275 Multifunction Indicator Weight &
Size.
5.4.4 Updated wording of Note 4 of Table 5-3 AHRS Interfaces and Configuration Settings.
Appendix B
Corrected pin designations for UMA sensors in Figure B-8 GEA 24 Sensor Interconnect,
Sheet 1.
Added Fuel Return interconnect to Figure B-8 GEA 24 Sensor Interconnect, Sheet 2.
Corrected pin designations for UMA sensors in Figure B-10 GEA 110 Sensor
Interconnect, Sheet 1.
Added requirement for GFC 500 interface to Figure B-28 GDU 620 ARINC 429 Interface.
Appendix C Added [3] in Table C-1 LRU Interface Summary about minimum GEA 110 software for GI
275 software v2.42 or later.
C.10 Added note about minimum GEA 110 software for GI 275 software v2.42 or later in Table
C-11 Compatible Engine Adapters.
C.19
Added sensor versions, new UMA Fuel Pressure sensors, and [6] about minimum GEA
110 software and P-lead sensor configuration requirements for GI 275 software v2.42 or
later in Table C-20 EIS Sensor Compatibility.
F.1 Added text restricting display of Fuel Quantity gauge to only a single EIS unit in twin-
engine installations.

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DEFINITIONS
WARNING
This product, its packaging, and its components contain chemicals known to the State of
California to cause cancer, birth defects, or reproductive harm. This notice is being
provided in accordance with California's Proposition 65. For questions or additional
information, refer to www.garmin.com/prop65.
WARNING
Perchlorate Material – special handling may apply.
Refer to www.dtsc.ca.gov/hazardouswaste/perchlorate.
WARNING
Failure to properly configure the EIS gauges per the POH/AFM and other approved data
could result in serious injury, damage to equipment, or death.
WARNING
This product contains a Lithium-ion battery that must be recycled or disposed of properly.
Battery replacement and removal must be performed by a licensed A&P technician.
WARNING
A Warning means injury or death is possible.
CAUTION
A Caution means that damage to the equipment is possible.
NOTE
A Note provides additional information.

190-02246-10 GI 275 Part 23 AML STC Installation Manual
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Acronyms
A
ADAHRS Air Data/Attitude and Heading Reference System
ADC Air Data Computer
ADI Attitude Direction Indicator
ADS-B Automatic Dependent Surveillance - Broadcast
AFCS Automatic Flight Control System
AFMS Aircraft Flight Manual Supplement
AFM Aircraft Flight Manual
AGL Above Ground Level
AHRS Attitude Heading Reference System
ALT Altitude
AML Approved Model List
AP Autopilot
ASI Airspeed Indicator
ASTM American Society for Testing and Materials
C
CDI Course Deviation Indicator
CDT Compressor Discharge Temperature
CFR Code of Federal Regulation
CHT Cylinder Head Temperature
CWS Control Wheel Steering
D
DC Direct Current
DG Directional Gyro
E
EAR Export Administration Regulations
ECDI Electronic Course Deviation Indicator
EFIS Electronic Flight Instrument System
EGT Exhaust Gas Temperature
EHSI Electronic Horizontal Situation Indicator
EIS Engine Indication System
EMC Electromagnetic Compatibility
EMI Electromagnetic Interference
F
FAA Federal Aviation Administration
FAR Federal Aviation Regulation
FD Flight Director

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FIS-B Flight Information Services-Broadcast
FLTA Forward Looking Terrain Avoidance
FOV Field of View
FPM Feet Per Minute
G
GA Go Around
GDC Garmin Air Data Computer
GDL Garmin Data Link
GDU Garmin Display Unit
GEA Garmin Engine and Airframe
GMA Garmin Marker/Audio
GMU Garmin Magnetometer Unit
GNS Garmin Navigation System
GNSS Global Navigation Satellite System
GP Glide Path
GPS Global Positioning System
GPSS Global Positioning System Steering
GPWS Ground Proximity Warning System
GRS Garmin Reference System
GS Glideslope
GSB Garmin Serial Bus
GSU Garmin Sensing Unit
GTN Garmin Touchscreen Navigator
GTOW Gross Takeoff Weight
GTP Garmin Temperature Probe
GTS Garmin Traffic System
GTX Garmin Transponder
GWX Garmin Weather Radar
H
HSDB High Speed Data Bus
HSI Horizontal Situation Indicator
I
IAS Indicated Airspeed
IAT Induction Air Temperature
IFR Instrument Flight Rules
IGRF International Geomagnetic Reference Field
ILS Instrument Landing System
ISA International Standard Atmosphere

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IVSI Instantaneous Vertical Speed Indicator
K
KIAS Knots Indicated Airspeed
KPH Kilometers Per Hour
Kts Knots
L
LCD Liquid Crystal Display
LOC Localizer
LRU Line Replaceable Unit
M
MFD Multi-Function Display
MPH Miles Per Hour
MPS Meters Per Second
N
NAV Navigation
O
OAT Outside Air Temperature
OEM Original Equipment Manufacturer
P
PFD Primary Flight Display
PIT Pitch Attitude Hold
P/N Part Number
POH Pilot’s Operating Handbook
PVT Position, Velocity, and Time
R
RP Reduced Protection
RPM Revolutions Per Minute
S
SAE Society of Automotive Engineers
SAT Static Air Temperature
SBAS Satellite-Based Augmentation System
STC Supplemental Type Certificate
SVT Synthetic Vision Technology
SXM Sirius XM
T
TA Traffic Advisory
TAS Traffic Advisory System
TAT Total Air Temperature

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TAWS Terrain Awareness and Warning System
TC Type Certificate
TCAD Traffic Collision Avoidance Device
TCAS Traffic Alert and Collision Avoidance System
TCDS Type Certificate Data Sheet
TIS-B Traffic Information Service - Broadcast
TIT Turbine Inlet Temperature
TNC Threaded Neill-Concelman
TSO Technical Standard Order
U
UTC Universal Time Coordinated
V
VDI Vertical Deviation Indicator
VHF Very High Frequency
VFR Visual Flight Rules
VLOC VOR/Localizer
VOR Very High Frequency Omni-directional Range
VS Vertical Speed
W
WAAS Wide Area Augmentation System

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TABLE OF CONTENTS
1 GI 275 DESCRIPTION ...................................................................................................... 1-1
1.1 STC Applicability ......................................................................................................................1-2
1.2 System Overview .......................................................................................................................1-3
1.3 Equipment ................................................................................................................................1-20
1.4 System Architecture Examples ................................................................................................1-26
2 LIMITATIONS................................................................................................................... 2-1
2.1 Installation Limitations ..............................................................................................................2-2
2.2 Operational Limitations..............................................................................................................2-7
3 PREPARATION ................................................................................................................. 3-1
3.1 Materials and Parts .....................................................................................................................3-2
3.2 GI 275 Installation Requirements ..............................................................................................3-7
3.3 Interfaces to Other Equipment .................................................................................................3-20
3.4 Selection of GI 275 System Components ...............................................................................3-24
3.5 Electrical Load Analysis ..........................................................................................................3-29
4 INSTALLATION................................................................................................................ 4-1
4.1 Wire Routing and Installation ....................................................................................................4-2
4.2 Pitot-Static Routing....................................................................................................................4-5
4.3 Equipment Bonding..................................................................................................................4-10
4.4 Instrument Panel Installations ..................................................................................................4-12
4.5 Backshell Assembly .................................................................................................................4-32
4.6 Display Sensors ........................................................................................................................4-37
4.7 Engine Indicating System.........................................................................................................4-60
4.8 Weight and Balance .................................................................................................................4-77
5 SYSTEM CONFIGURATION .......................................................................................... 5-1
5.1 System Configuration Preparation .............................................................................................5-3
5.2 Software / Configuration............................................................................................................5-5
5.3 Unit Type....................................................................................................................................5-7
5.4 Interfaces ..................................................................................................................................5-10
5.5 Setup.........................................................................................................................................5-34
5.6 EIS............................................................................................................................................5-56
5.7 Calibration/Checks ...................................................................................................................5-68
5.8 External Systems ......................................................................................................................5-83
5.9 Diagnostics ...............................................................................................................................5-84
5.10 System Info ..............................................................................................................................5-86
5.11 Maintenance .............................................................................................................................5-86
5.12 Restart Options.........................................................................................................................5-87
5.13 Wireless Connectivity ..............................................................................................................5-88
5.14 Database Loading.....................................................................................................................5-89
6 SYSTEM CHECKOUT...................................................................................................... 6-1
6.1 Checkout Log .............................................................................................................................6-2
6.2 Configuration Ground Checks ...................................................................................................6-5
6.3 Interfaced Equipment Ground Checks .......................................................................................6-6
6.4 AHRS Ground Checks .............................................................................................................6-22
6.5 Indicator-Specific Checks ........................................................................................................6-28
6.6 Placards and Switch Labeling Check.......................................................................................6-35

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6.7 Electromagnetic Interference (EMI) Check .............................................................................6-36
6.8 Flight Checks............................................................................................................................6-38
6.9 Documentation Checks ............................................................................................................6-43
7 TROUBLESHOOTING ..................................................................................................... 7-1
7.1 Troubleshooting Flowcharts.......................................................................................................7-2
7.2 Additional Troubleshooting .....................................................................................................7-18
APPENDIX A CONNECTORS AND PIN FUNCTION..................................................... A-1
A.1 GI 275........................................................................................................................................A-2
A.2 GEA 24......................................................................................................................................A-6
A.3 GEA 110..................................................................................................................................A-10
A.4 GMU 44B................................................................................................................................A-13
A.5 GMU 11...................................................................................................................................A-14
A.6 GTP 59 ....................................................................................................................................A-15
A.7 GSB 15 ....................................................................................................................................A-15
APPENDIX B INTERCONNECT DIAGRAMS .................................................................. B-1
APPENDIX C EQUIPMENT COMPATIBILITY AND CONFIGURATION ................ C-1
C.1 Electronic Standby Indicators ................................................................................................... C-3
C.2 ADC .......................................................................................................................................... C-4
C.3 AHRS ........................................................................................................................................ C-5
C.4 GPS Source ............................................................................................................................... C-6
C.5 VHF Navigation Receiver......................................................................................................... C-8
C.6 Analog Navigation Receiver ................................................................................................... C-10
C.7 Radar Altimeter ....................................................................................................................... C-11
C.8 Autopilot.................................................................................................................................. C-12
C.9 External Flight Director .......................................................................................................... C-15
C.10 EIS........................................................................................................................................... C-16
C.11 Transponder Control ............................................................................................................... C-16
C.12 Serial Altitude (RS-232).......................................................................................................... C-16
C.13 Traffic Source.......................................................................................................................... C-17
C.14 Weather Source ....................................................................................................................... C-19
C.15 Lightning/Electrical Discharge Source ................................................................................... C-19
C.16 GFC 500 PFD Sync................................................................................................................. C-20
C.17 External TAWS ....................................................................................................................... C-20
C.18 Audio Panel ............................................................................................................................. C-21
C.19 EIS Sensors ............................................................................................................................. C-22
APPENDIX D MODEL-SPECIFIC DATA ......................................................................... D-1
APPENDIX E ADVANCED AIRSPEED SETTINGS ......................................................... E-1
E.1 Overview ................................................................................................................................... E-2
E.2 Configuration Page Layout ....................................................................................................... E-2
E.3 Arc Ranges ................................................................................................................................ E-3
E.4 Overspeeds ................................................................................................................................ E-6
E.5 Bugs........................................................................................................................................... E-8
E.6 Markings.................................................................................................................................... E-9
E.7 Airspeed Tape Configuration Examples ................................................................................. E-10
APPENDIX F EIS GAUGE LAYOUT .................................................................................. F-1
F.1 Main EIS Page............................................................................................................................F-2

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F.2 AUX EIS Page ...........................................................................................................................F-7
F.3 CHT/EGT Page ..........................................................................................................................F-8
F.4 Fuel Page ....................................................................................................................................F-9
F.5 Summary Page..........................................................................................................................F-10
F.6 Gauge Markings .......................................................................................................................F-11
APPENDIX G HIRF AND LIGHTNING PROTECTION................................................. G-1
G.1 Shielded Wire............................................................................................................................G-2
G.2 Lightning Zones for GTP 59 and GMU 11/44B .......................................................................G-3
G.3 Example Lightning Zoning Diagrams.....................................................................................G-19

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LIST OF TABLES
Table 1-1 Garmin Manuals and References for GI 275 System...........................................................1-5
Table 1-2 Garmin Installation Manuals for Other Systems..................................................................1-5
Table 1-3 Technical References ...........................................................................................................1-6
Table 1-4 GI 275 Variant Functionality ...............................................................................................1-6
Table 1-5 Primary ADI Features by Unit Selection .............................................................................1-8
Table 1-6 HSI Features by Unit Selection ..........................................................................................1-11
Table 1-7 MFD Features by Unit Selection........................................................................................1-13
Table 1-8 CDI Features by Unit Selection..........................................................................................1-14
Table 1-9 Standby Indicator Features by Unit Selection....................................................................1-16
Table 1-10 EIS Features by Unit Selection ..........................................................................................1-17
Table 3-1 GI 275 Units .........................................................................................................................3-2
Table 3-2 GI 275 Connector Kits .........................................................................................................3-2
Table 3-3 GI 275 LRUs ........................................................................................................................3-3
Table 3-4 LRU Installation Kits ...........................................................................................................3-3
Table 3-5 HSDB Cables .......................................................................................................................3-4
Table 3-6 EIS Annunciator ...................................................................................................................3-5
Table 3-7 Recommended Crimp Tools.................................................................................................3-6
Table 3-8 Power Distribution ...............................................................................................................3-7
Table 3-9 Switch Labels .......................................................................................................................3-8
Table 3-10 Circuit Breaker Labels - Single Essential Bus .....................................................................3-8
Table 3-11 Circuit Breaker Labels - Independent Essential Busses.......................................................3-9
Table 3-12 GI 275 Standby ADI Restrictions per System....................................................................3-10
Table 3-13 GI 275 HSI/Standby ADI Restrictions...............................................................................3-11
Table 3-14 Required Gauges for EIS....................................................................................................3-12
Table 3-15 Additional Gauges..............................................................................................................3-12
Table 3-16 Available EIS Parameters...................................................................................................3-13
Table 3-17 Garmin LRU HSDB Port Summary...................................................................................3-15
Table 3-18 Traffic Interface..................................................................................................................3-20
Table 3-19 Autopilots and Interfaces....................................................................................................3-22
Table 3-20 External TAWS Setup with GI 275....................................................................................3-23
Table 3-21 Aircraft Eligibility Checklist ..............................................................................................3-24
Table 3-22 GI 275 System Components...............................................................................................3-25
Table 3-23 EGT and CHT Probe Quantity ...........................................................................................3-26
Table 3-24 LRU Current Draw.............................................................................................................3-29
Table 3-25 Net Electrical Load Change Calculation Example (14 VDC Aircraft) ..............................3-30
Table 4-1 Bonding Requirements .......................................................................................................4-10
Table 4-2 GI 275 Multifunction Indicator Weight & Size .................................................................4-15
Table 4-3 Backup Battery Weight and Size........................................................................................4-21
Table 4-4 GSB 15 Weight and Size....................................................................................................4-25
Table 4-5 GMU Recommended Distance from Sources of Magnetic Interference ...........................4-37
Table 4-6 Example Magnetic Interference Test Sequence List..........................................................4-41
Table 4-7 GMU 11 Weight and Size ..................................................................................................4-42
Table 4-8 GMU 44B Weight and Size................................................................................................4-48
Table 4-9 Backup GPS Antenna Weight and Size .............................................................................4-57
Table 4-10 GEA 24 Weight and Size ...................................................................................................4-61
Table 4-11 GEA 110 Weight and Size .................................................................................................4-64
Table 4-12 Weight and Balance Calculation Example.........................................................................4-77
Table 5-1 ADC Interfaces and Configuration Settings.......................................................................5-12

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Table 5-2 ADC Configuration Priority...............................................................................................5-12
Table 5-3 AHRS Interfaces and Configuration Settings ....................................................................5-13
Table 5-4 AHRS Configuration Priority.............................................................................................5-14
Table 5-5 GPS Interfaces and Configuration Settings........................................................................5-15
Table 5-6 NAV Interfaces and Configuration Settings ......................................................................5-16
Table 5-7 RAD ALT Interfaces and Configuration Settings..............................................................5-17
Table 5-8 Garmin GFC 500 Autopilot Configuration ........................................................................5-18
Table 5-9 Garmin GFC 600 Autopilot Configuration ........................................................................5-18
Table 5-10 Bendix M-4C/M-4D Autopilot Configuration ...................................................................5-18
Table 5-11 Century 2000 Autopilot Configuration ..............................................................................5-19
Table 5-12 Century 21/31 Autopilot Configuration .............................................................................5-19
Table 5-13 Century 41 Autopilot Configuration ..................................................................................5-19
Table 5-14 Century II/III Autopilot Configuration...............................................................................5-20
Table 5-15 Century IV AC Autopilot Configuration............................................................................5-20
Table 5-16 Century IV DC Autopilot Configuration............................................................................5-20
Table 5-17 Cessna AC Autopilot Configuration ..................................................................................5-21
Table 5-18 Cessna DC Autopilot Configuration (1000 IFCS) .............................................................5-21
Table 5-19 Cessna DC Autopilot Configuration ..................................................................................5-22
Table 5-20 Collins AP-106/107 Autopilot Configuration ....................................................................5-22
Table 5-21 Honeywell (Bendix/King) KAP 150/KFC 150 Autopilot Configuration ..........................5-23
Table 5-22 Honeywell (Bendix/King) KAP 100/200 Autopilot Configuration ...................................5-23
Table 5-23 Honeywell (Bendix/King) KAP 140 Autopilot Configuration ..........................................5-23
Table 5-24 Honeywell (Bendix/King) KFC 225 Autopilot Configuration...........................................5-24
Table 5-25 Honeywell (Bendix/King) KFC 250-4” HSI Autopilot Configuration..............................5-24
Table 5-26 Honeywell (Bendix/King) KFC 200/250-3” HSI Autopilot Configuration.......................5-25
Table 5-27 Honeywell (Bendix/King) KFC 300 Autopilot Configuration...........................................5-25
Table 5-28 Sperry SPZ-200A/500 Autopilot Configuration ................................................................5-26
Table 5-29 S-TEC 20/30/40/50/60-1 Autopilot Configuration ............................................................5-26
Table 5-30 S-TEC 60-2/65/60 PSS Autopilot Configuration...............................................................5-27
Table 5-31 S-TEC 55X Autopilot Configuration .................................................................................5-27
Table 5-32 S-TEC 55 Autopilot Configuration ....................................................................................5-28
Table 5-33 AHRS Emulation Configuration Settings ..........................................................................5-28
Table 5-34 Transponder Configuration Settings ..................................................................................5-28
Table 5-35 EIS/GEA Configuration Settings .......................................................................................5-29
Table 5-36 Engine Annunciator Configuration Settings ......................................................................5-29
Table 5-37 Traffic System Configuration Settings...............................................................................5-30
Table 5-38 GDL 69 Configuration Settings .........................................................................................5-31
Table 5-39 Stormscope Configuration Settings....................................................................................5-32
Table 5-40 PFD Sync Configuration Settings ......................................................................................5-32
Table 5-41 General Purpose Discrete In Settings.................................................................................5-32
Table 5-42 General Purpose Discrete Out Settings ..............................................................................5-32
Table 5-43 General Purpose A429 Output Settings..............................................................................5-33
Table 5-44 General Purpose Serial Port Setting ...................................................................................5-33
Table 5-45 Airframe-Specific Configuration Data – Configuration Type Basic Setting .....................5-37
Table 5-46 Photocell Configuration Procedure ....................................................................................5-39
Table 5-47 Lighting Bus Configuration Procedure ..............................................................................5-41
Table 5-48 Photocell Configuration Procedure - Enhanced Lighting ..................................................5-42
Table 5-49 Lighting Bus Configuration Procedure - Enhanced (Display) ...........................................5-43
Table 5-50 Lighting Bus Configuration Procedure - Enhanced (Knob)...............................................5-45
Table 5-51 Terrain/TAWS Setting .......................................................................................................5-53

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Table 5-52 TAWS Airframe-Specific Configuration Data...................................................................5-53
Table 5-53 EIS Configuration - Engine................................................................................................5-57
Table 5-54 Cruise RPM Setting............................................................................................................5-57
Table 5-55 Fuel Flow K-Factor ............................................................................................................5-61
Table 5-56 CHT/EGT Page Advanced Settings ...................................................................................5-62
Table 5-57 Original Gauge Settings .....................................................................................................5-64
Table 5-58 Additional Gauge Settings..................................................................................................5-64
Table 5-59 Gauge Minimum and Maximum Ranges ...........................................................................5-66
Table 5-60 Extension Harness Parts .....................................................................................................5-70
Table 5-61 Fuel Page Settings ..............................................................................................................5-79
Table 5-62 Fuel Quantity Calibration Settings .....................................................................................5-80
Table 5-63 LRU Status Indicators ........................................................................................................5-86
Table 5-64 Database Summary.............................................................................................................5-91
Table 6-1 Checkout Log .......................................................................................................................6-2
Table 6-2 Interfaced Equipment Ground Check Section Reference.....................................................6-6
Table 6-3 Localizer/Glideslope Checks................................................................................................6-9
Table 6-4 Heading Verification AHRS ..............................................................................................6-24
Table 6-5 Airspeed Test Points...........................................................................................................6-29
Table A-1 GI 275 Unit Connectors ......................................................................................................A-2
Table A-2 J2751/P2751 Connector ......................................................................................................A-3
Table A-3 J2752/P2752 Connector ......................................................................................................A-4
Table A-4 GI 275 - GEA 24 .................................................................................................................A-6
Table A-5 J241/P241 Connector ..........................................................................................................A-7
Table A-6 J242/P242 Connector ..........................................................................................................A-7
Table A-7 J243/P243 Connector ..........................................................................................................A-8
Table A-8 J244/P244 Connector ..........................................................................................................A-9
Table A-9 GI 275 - GEA 110 Connectors ..........................................................................................A-10
Table A-10 J1101/P1101 Connector ....................................................................................................A-11
Table A-11 J1102/P1102 Connector ....................................................................................................A-11
Table A-12 GI 275 - GMU 44B Connectors ........................................................................................A-13
Table A-13 J442/P442 Connector ........................................................................................................A-13
Table A-14 GI 275 - GMU 11 Connectors...........................................................................................A-14
Table A-15 J111/P111 Connector ........................................................................................................A-14
Table A-16 3-Conductor Shielded Cable .............................................................................................A-15
Table A-17 J201/P201 & J202/P202 ....................................................................................................A-15
Table C-1 LRU Interface Summary ..................................................................................................... C-2
Table C-2 Electronic Standby Indicator ............................................................................................... C-3
Table C-3 Compatible Air Data Computers......................................................................................... C-4
Table C-4 Compatible Attitude and Heading Reference Systems ....................................................... C-5
Table C-5 Compatible GPS Position Source........................................................................................ C-6
Table C-6 Compatible VHF Navigation Receiver ............................................................................... C-8
Table C-7 Compatible Analog Navigation Receiver.......................................................................... C-10
Table C-8 Compatible Radar Altimeter ............................................................................................. C-11
Table C-9 Compatible Autopilot........................................................................................................ C-12
Table C-10 Compatible External Flight Director................................................................................. C-15
Table C-11 Compatible Engine Adapters............................................................................................. C-16
Table C-12 Compatible Transponders.................................................................................................. C-16
Table C-13 RS-232 Serial Altitude ...................................................................................................... C-16
Table C-14 Compatible Traffic Source ................................................................................................ C-17
Table C-15 Compatible Weather Radar Sources.................................................................................. C-19

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Table C-16 Compatible Lightning/Electrical Discharge Source.......................................................... C-19
Table C-17 Compatible GFC 500 PFD Sync Interfaces ...................................................................... C-20
Table C-18 Compatible External TAWS Sources................................................................................ C-20
Table C-19 Compatible Audio Panels.................................................................................................. C-21
Table C-20 EIS Sensor Compatibility.................................................................................................. C-22
Table D-1 Aircraft Model-Specific Data .............................................................................................D-2
Table E-1 Advanced Airframe-Specific Configuration Data – Arc Ranges........................................ E-3
Table E-2 Advanced Airframe-Specific Configuration Data – Bugs .................................................. E-8
Table E-3 Advanced Airframe-Specific Configuration Data – Alternate Bugs................................... E-8
Table E-4 Advanced Airframe-Specific Configuration Data – Markings ........................................... E-9

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LIST OF FIGURES
Figure 1-1 GI 275 System Installation (Before and After Example) ....................................................1-4
Figure 1-2 GI 275 Primary ADI ............................................................................................................1-7
Figure 1-3 GI 275 Horizontal Situation Indicator ...............................................................................1-10
Figure 1-4 GI 275 Multi-Function Display Indicator..........................................................................1-12
Figure 1-5 GI 275 Course Deviation Indicator....................................................................................1-14
Figure 1-6 GI 275 Standby Indicator...................................................................................................1-15
Figure 1-7 GI 275 Single-Engine EIS Interfaces ................................................................................1-17
Figure 1-8 GI 275 Twin-Engine EIS Interfaces ..................................................................................1-18
Figure 1-9 VFR GPS Antenna.............................................................................................................1-20
Figure 1-10 GMU 44B Magnetometer..................................................................................................1-21
Figure 1-11 GMU 11 Magnetometer.....................................................................................................1-21
Figure 1-12 GTP 59 OAT Probe ...........................................................................................................1-21
Figure 1-13 GEA 24 Engine Adapter....................................................................................................1-22
Figure 1-14 GEA 110 Engine Adapter..................................................................................................1-22
Figure 1-15 EIS Annunciator (Single) ..................................................................................................1-23
Figure 1-16 EIS Annunciator (Separate)...............................................................................................1-23
Figure 1-17 Carburetor Temperature Probe ..........................................................................................1-23
Figure 1-18 Oil Temperature Probe ......................................................................................................1-23
Figure 1-19 Fuel Flow Transducer FT-60 (Left) and FT-90 (Right) ....................................................1-24
Figure 1-20 Brass (Left) and Stainless Steel (Right) Pressure Sensors.................................................1-24
Figure 1-21 Backup Battery ..................................................................................................................1-25
Figure 1-22 GSB 15 Variants ................................................................................................................1-25
Figure 1-23 GI 275 Primary ADI and Twin-Engine EIS ......................................................................1-26
Figure 1-24 GI 275 Primary ADI, Reverting HSI/Standby ADI, and EIS............................................1-27
Figure 1-25 GI 275 Primary ADI, HSI, and MFD ................................................................................1-28
Figure 1-26 GI 275 Primary ADI, Reverting MFD/Standby ADI, and HSI .........................................1-29
Figure 1-27 GI 275 Primary ADI, Reverting MFD/Standby ADI, HSI, and Single-Engine EIS .........1-30
Figure 1-28 GI 275 Primary ADI, Reverting HSI/Standby ADI, MFD, and EIS .................................1-31
Figure 1-29 KI 256 and KI 525 Replacement .......................................................................................1-32
Figure 3-1 HSDB Architecture: Legend..............................................................................................3-15
Figure 3-2 HSDB Architecture: Primary ADI.....................................................................................3-16
Figure 3-3 HSDB Architecture: Primary ADI with GFC 600 Autopilot ............................................3-16
Figure 3-4 HSDB Architecture: EIS....................................................................................................3-16
Figure 3-5 HSDB Architecture: MFD.................................................................................................3-17
Figure 3-6 HSDB Architecture: Primary ADI with GFC 600 and HSI/Standby ADI ........................3-17
Figure 3-7 HSDB Architecture: Primary ADI with GFC 600, HSI/Standby ADI, and EIS ...............3-18
Figure 3-8 HSDB Architecture: Primary ADI, MFD/Standby ADI, HSI, and EIS ............................3-18
Figure 3-9 HSDB Architecture: Primary ADI, MFD/Standby ADI, HSI, EIS, Co-Pilot ADI ...........3-19
Figure 3-10 Ammeter Placement for Current Measurement.................................................................3-32
Figure 3-11 Tabulated Electrical Load Form ........................................................................................3-33
Figure 3-12 Example of Completed Tabulated Electrical Load Form ..................................................3-35
Figure 4-1 Shield Termination Methods ...............................................................................................4-4
Figure 4-2 Pitot-Static Connections for Single GI 275 Installation ......................................................4-6
Figure 4-3 Pitot-Static Connections for Single GI 275 Installation ......................................................4-7
Figure 4-4 Pitot-Static Connections for Dual GI 275 Installation.........................................................4-8
Figure 4-5 Pitot-Static Connections for Dual GI 275 Installation.........................................................4-9
Figure 4-6 Example of Pilot Field-of-View Installation .....................................................................4-12
Figure 4-7 Example of GI 275s in “Six Pack” Instrument Panel (Single-Engine) .............................4-13