Garmin G3X Touch User manual

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
© Copyright 2019-2021
Garmin Ltd. or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted,
disseminated, downloaded or stored in any storage medium, for any purpose without the express prior
written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual
and of any revision to this manual onto a hard drive or other electronic storage medium to be viewed and
to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of
this manual or revision must contain the complete text of this copyright notice and provided further that any
unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: [phone]
www.garmin.com

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page i
Garmin International, Inc
Log of Revisions
FAA Approved
AIRPLANE FLIGHT MANUAL SUPPLEMENT
or
SUPPLEMENTAL AIRPLANE FLIGHT MANUAL
for the
GARMIN G3X TOUCH ELECTRONIC FLIGHT INSTRUMENT SYSTEM
REV
NO. PAGE NO(S) DESCRIPTION DATE OF APPROVAL FAA APPROVED
1 ALL Original Issue 03/15/19
Robert Murray
ODA STC Unit
Administrator
2 2-2, 2-5
Added limitation for installations
with an autopilot other than
GFC500.
04/05/19
Paul Mast
ODA STC Unit
Administrator
3 1-5, 2-1 Added GPS 175 / GNX 375 as
approved IFR navigators. 5/30/19
Paul Mast
ODA STC Unit
Administrator
4 ALL
Incorporate system software
v8.60 and associated hardware
changes.
12/20/19
Robert Murray
ODA STC Unit
Administrator
5 ALL
Formatting changes throughout
document. Clarified requirements
for IFR vs. VFR navigation,
updated emergency procedures,
annunciations, and autopilot
configuration applicability. Added
graphics for deviation indicators.
Revised transponder mode
description. Addition of Smart
Glide.
SEE COVER SEE COVER

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page ii
This page intentionally left blank.

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page iii
Table of Contents
1General.................................................................................................................. 1-1
1.1 G3X Touch GNSS (GPS/SBAS) Navigation Equipment Approvals..................................... 1-5
1.2 Abbreviations and Terminology...........................................................................................1-7
2Limitations ............................................................................................................ 2-1
2.1 System Software Requirements...........................................................................................2-1
2.2 Standby Flight Instruments.................................................................................................. 2-1
2.3 Navigation Systems for IFR Operations .............................................................................. 2-1
2.4 Databases .............................................................................................................................2-2
2.5 AHRS Operational Area........................................................................................................ 2-2
2.6 Magnetic Variation Operational Area................................................................................... 2-2
2.7 Navigation Angle .................................................................................................................. 2-2
2.8 ADAHRS Systems Status.....................................................................................................2-3
2.9 Aerobatic Maneuvers............................................................................................................2-3
2.10 Other Autopilots................................................................................................................2-3
2.11 Synthetic Vision ................................................................................................................2-3
2.12 Moving Maps .....................................................................................................................2-3
2.13 Terrain Display .................................................................................................................. 2-3
2.14 Terrain Alerts.....................................................................................................................2-3
2.15 Traffic Display ................................................................................................................... 2-3
2.16 Surface Operations ........................................................................................................... 2-4
2.17 Glide Range Ring .............................................................................................................. 2-4
2.18 Powerplant Gauge Markings.............................................................................................2-4
2.19 Weight and Balance .......................................................................................................... 2-4
2.20 Data link Products (SiriusXM, FIS-B, and Connext)......................................................... 2-4
2.21 Glove Usage ...................................................................................................................... 2-4
2.22 Service Required...............................................................................................................2-4
2.23 Portable Electronic Devices .............................................................................................2-5
2.24 Kinds of Operations.......................................................................................................... 2-5
2.25 Placards.............................................................................................................................2-6
3Emergency Procedures ....................................................................................... 3-1
3.1 ADC Failure (GSU 25) ........................................................................................................... 3-1
3.2Attitude Failure (GSU 25)...................................................................................................... 3-1
3.3 Attitude Aligning / Keep Wings Level .................................................................................. 3-2
3.4 AHRS ALIGN ......................................................................................................................... 3-2

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page iv
3.5 Autopilot Abnormal Disconnect (GFC 500) ......................................................................... 3-2
3.6 G5/G3X Touch Altimeter Barometric Window Cyan............................................................ 3-2
3.7 EIS Failure.............................................................................................................................3-3
3.8 Erroneous Air Data or Attitude Information on the G3X PFD ............................................. 3-3
3.9 G3X Touch Failure Annunciations....................................................................................... 3-3
3.10 Heading Failure, Loss of Magnetometer Data, or Magnetic Field Error.......................... 3-4
3.11 PFD Failure........................................................................................................................ 3-4
3.12 Navigation Data Failure (GPS/VOR/LOC/GS) ................................................................... 3-5
3.13 TERRAIN ALERTS .............................................................................................................3-6
3.14 WARNINGS, CAUTIONS, and ADVISORIES ..................................................................... 3-7
4Normal Procedures .............................................................................................. 4-1
4.1 Before Starting Engine ......................................................................................................... 4-1
4.2 After Starting Engine............................................................................................................4-1
4.3 COM Radio Tuning (Optional) .............................................................................................. 4-2
4.4 Lateral Navigation.................................................................................................................4-2
4.5 Approaches...........................................................................................................................4-4
4.6 Barometric Minimums Alert ............................................................................................... 4-15
4.7 Transponder Operation (Optional)..................................................................................... 4-15
4.8 Disable Electronic Stability Protection (ESP).................................................................... 4-15
5Performance ......................................................................................................... 5-1
6Weight and Balance ............................................................................................. 6-1
7System Description.............................................................................................. 7-1
7.1 Primary Flight Instruments .................................................................................................. 7-1
7.2 Vertical Deviation Indicators................................................................................................ 7-4
7.3 HSI Annunciations................................................................................................................ 7-5
7.4 Course Deviation Indicator (CDI) ......................................................................................... 7-5
7.5 Display of PFD information on MFD .................................................................................... 7-6
7.6 Engine Indication System .................................................................................................... 7-7
7.7 Communication / Navigation / Surveillance System ........................................................... 7-7
7.8 Remote Transponder Interface ............................................................................................ 7-7
7.9 Minimum Altitude Display and Alerting............................................................................... 7-8
7.10 AOA Probe.........................................................................................................................7-8
7.11 GAD 27 Wig Wag ...............................................................................................................7-8
7.12 EIS Caution / Warning Lights............................................................................................ 7-9
7.13 Smart Glide........................................................................................................................ 7-9

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page | 1-1
1 GENERAL
The information in this supplement is FAA-approved and must be attached to the Pilot’s Operating
Handbook and FAA Approved Airplane Flight Manual (POH/AFM) when the airplane has been
modified by the installation of the Garmin G3X Touch Electronic Flight Instrument System in
accordance with STC SA01899WI.
The information in this supplement supersedes or adds to the basic POH/AFM only as set forth below.
Users of the manual are advised to always refer to the supplement for possibly superseding
information and placarding applicable to operation of the airplane.
The G3X Touch provides one or more of the following functions:
•Primary Flight Display (PFD) – Provides attitude, air data, heading, and navigation information
to the pilot.
•Multi-Function Display (MFD) – Provides pilot awareness of factors that may affect the overall
conduct of the flight such as advanced moving map including terrain, obstacle and traffic alerts,
georeferenced FliteCharts®or Jeppesen®ChartView™ charts and SafeTaxi®airport diagrams.
•Engine Indication System (EIS) – Provides engine and airframe operating parameters to the
pilot.
The G3X Touch is scalable with a variety of configurations made up of the 7” portrait GDU 470 and
the 10” landscape GDU 460. Installations may consist of one or both display types in any combination
from one to three displays (or up to four displays total in tandem cockpit aircraft). A minimum
installation with a single display may be a standalone MFD or a PFD which can be split screened to
provide both PFD and MFD functions. EIS can optionally be displayed on any GDU except a 7” portrait
PFD. Only one display per cockpit can be installed as a PFD (any second or third display is an MFD).

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 1-2
Single 7” Portrait GDU (PFD with MFD in split mode, No EIS)
Single 10” GDU (PFD & MFD, EIS Optional)

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page | 1-3
Dual 7” Portrait GDUs (PFD & MFD, EIS Optional)
One 10” + One 7” Portrait GDU (PFD & MFD, EIS Optional)

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 1-4
The PFD has an internal WAAS GPS receiver for VFR operations and a touchscreen interface. The
G3X Touch system also can interface with an external, IFR approved navigator for IFR operations.
Aircraft without an external, IFR approved navigator are approved for VFR operations only. Refer to
equipment requirements for IFR operations in Limitations Section 2.3, Navigation Systems for IFR
Operations, and the table in Section 2.24, Kinds of Operations.
PFD installations require the installation of a GSU 25 ADAHRS, GMU 11 magnetometer, GTP 59
temperature probe, and the GAD 27 voltage stabilizer (14V airframes with EIS). For all PFD
installations in aircraft approved for IFR operations, standby instruments and an IFR approved
navigation system are required.
If the installation includes a separate PFD and MFD, reversionary backup is available should a failure
of either display occur. In reversionary mode, the remaining G3X Touch display combines critical flight
instrumentation with engine readouts (if installed) and navigation information in a single-screen
consolidated presentation.
If EIS functions are installed, they require the installation of a remote mounted GEA 24 Engine Airframe
unit and associated engine sensors.
MFD functions are supported by an internal GPS receiver or connection to an external,IFR approved
GPS navigator. G3X Touch flight displays can be integrated with a variety of systems including VHF
radios, transponders, audio panels, ADS-B, SiriusXM®data links, mobile devices via Garmin Connext®
and autopilot systems.
Carefully review the contents of this Airplane Flight Manual Supplement before operating the airplane.
Also review Pilot’s Guide 190-02472-00 Rev A, or later version applicable to the approved software
version of the G3X Touch system installed on the aircraft. The Pilot’s Guide provides details on the
features of the G3X Touch system.
USE OF THE AFMS
The following definitions apply to WARNINGS, CAUTIONS and NOTES found throughout the AFMS:
WARNING
Operating procedures, techniques, etc., which could result in personal injury or loss of
life if not carefully followed.
CAUTION
Operating procedures, techniques, etc., which could result in damage to equipment if
not carefully followed.
NOTE
Operating procedures, techniques, etc., which are considered essential to emphasize.

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page | 1-5
1.1 G3X Touch GNSS (GPS/SBAS) Navigation Equipment Approvals
G3X Touch is capable of IFR operations when an external, IFR approved navigation system is installed
and connected to the system and when the pilot selects the FPL Source to External. Refer to
equipment requirements for IFR operations in Limitations Section 2.3, Navigation Systems for IFR
Operations, and the table in Section 2.24, Kinds of Operations.
When no external,IFR approved navigator is connected, or when the pilot selects FPL Source to
Internal, G3X Touch provides VFR flight planning capabilities and guidance on the HSI.

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 1-6
This page intentionally left blank.

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page | 1-7
1.2 Abbreviations and Terminology
The following glossary is applicable within the airplane flight manual supplement
AC Advisory Circular
ADAHRS Air Data Attitude Heading Reference System
ADC Air Data Computer
ADS-B Automatic Dependent Surveillance-Broadcast
AFCS Automatic Flight Control System
AFM Airplane Flight Manual
AFMS Airplane Flight Manual Supplement
AHRS Attitude Heading Reference System
ALT Altitude
AML Approved Model List
AMMD Airport Moving Map Display
AOA Angle of Attack
AP Autopilot
APV Approach with Vertical Guidance
ATC Air Traffic Control
ATT Attitude
Baro Barometric
BC Back Course
CAN Controller Area Network
CB Circuit Breaker
CDI Course Deviation Indicator
CFR Code of Federal Regulations
COM Communication
DA Decision Altitude
DG Directional Gyro
ECS Electrical Control System
EIS Engine Indication System
ESP Electronic Stability and Protection
GA Go Around
GP Glide Path
GPSS GPS Steering
FAA Federal Aviation Administration
FAF Final Approach Fix
FD Flight Director

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 1-8
FIS-B Flight Information Service – Broadcast
FPL Flight Plan
FPM Feet Per Minute
GAD Garmin Adaptor Device
GDU Garmin Display Unit
GEA Garmin Engine and Airframe
GFC Garmin Flight Control
GMU Garmin Magnetometer Unit
GNC 255 Garmin Navigation and Communication Transceiver
GNS Garmin Navigation System
GNSS Global Navigation Satellite System
GNX Garmin Navigator Transponder
GP Glide Path
GPS Global Positioning System
GS Glide Slope or Ground Speed
GSU Garmin Sensor Unit (ADAHRS)
GTN Garmin Touch Navigation
GTP Garmin Temperature Probe
HDG Heading
HSI Horizontal Situation Indicator
IAF Initial Approach Fix
IAS Indicated Airspeed
IDENT Identification button on Transponder
IFR Instrument Flight Rules
ILS Instrument Landing System
INT Internal
K factor Fuel flow transducer calibration factor
LNAV Lateral Navigation
LNAV+V Lateral Navigation with Vertical Guidance
LP Localizer Precision
LP+V Localizer Precision with Advisory Vertical Guidance
LPV Localizer Precision with Vertical Guidance
LOC Localizer
LOI Loss of Integrity
MAX Maximum
MDA Minimum Descent Altitude

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
Page | 1-9
MFD Multi-Function Display
MIN Minimum
MSG Message
N/A Not Available
NAV Navigation
NOTAM Notice to Airmen
NRST Nearest
PFD Primary Flight Display
POH Pilot’s Operating Handbook
PTRIM Pitch Trim
OAT Outside Air Temperature
OBS Omni Bearing Selector
ODA Organizational Designation Authorization
REV Revision or Reversion
RNAV Area Navigation
RPM Revolutions per Minute
SBAS Satellite Based Augmentation System
SD Card Secure Digital Card
SFD Standby Flight Display
SL30 Garmin nav/com transceiver
STBY Standby
STC Supplemental Type Certificate
SYNC Synchronize
TAS True Airspeed
TAWS Terrain Alert and Warning System
VDI Vertical Deviation Indicator
TFR Temporary Flight Restriction
VFR Visual Flight Rules
VHF Very High Frequency
VMC Visual Meteorological Conditions
VNAV Vertical Navigation
VOR VHF Omni-directional Range
VSI Vertical Speed Indicator
WAAS Wide Area Augmentation System
XTK Cross Track Error
YD Yaw Damper

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 1-10
This page intentionally left blank.

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
FAA Approved Page | 2-1
2 LIMITATIONS
2.1 System Software Requirements
The G3X Touch must use the following or later FAA approved software versions for this AFMS revision to
be applicable:
Component Software Version
G3X Touch System Software 9.0
NOTE
This section is not intended to be a comprehensive list of approved software. It is
intended to provide a means to determine if this AFMS revision is applicable to the
software that is installed in the aircraft. Do not use this AFMS revision if the installation
has a software version less than that shown in the table above.
2.2 Standby Flight Instruments
Standby Instruments are required for aircraft approved for IFR operations.Refer to the table in
Section 2.24, Kinds of Operations.
2.3 Navigation Systems for IFR Operations
Aircraft approved for IFR operations must use one of the following navigation systems connected to
the G3X Touch system,and FPL Source on the PFD must be selected to External.
•Garmin GNC 300XL / GPS 155XL
•Garmin GPS, GNC, or GNS 4XX(W) / 5XX(W)
•Garmin GNS 480
•Garmin GTN 6XX / 7XX
•Garmin GPS 175 / GNX 375
•Garmin SL30
•Garmin GNC 255
•Garmin GNC 355/355A
OR
•A separate, non-Garmin, IFR approved GPS and/or VHF navigation system along with a
dedicated Course Deviation Indicator (CDI) separate from G3X Touch.
Refer to the table in Section 2.24, Kinds of Operations.
NOTE
Refer to the approved Airplane Flight Manual Supplement for the non-Garmin
navigation system (if installed) for information on IFR operations.
IFR operations are prohibited using G3X Touch while FPL Source is selected to Internal GPS
navigation as the navigation source on G3X Touch. When the internal navigation source is selected,
a cyan INT and magenta VFR annunciation is displayed on the HSI. When INT and VFR are
annunciated, IFR operations are prohibited based solely on guidance provided by G3X Touch.

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 2-2 FAA Approved
IFR operations are prohibited using G3X Touch for navigation when the G3X system is not connected
to an external, IFR approved navigator. Installations without an external, IFR approved navigator are
limited to VFR operations only and have a placard located near the pilot PFD. Refer to Section 2.25,
Placards.
2.4 Databases
Database updates via SD card must be done while the aircraft is on the ground and stationary.
Database transfers or updates are prohibited in flight.
2.5 AHRS Operational Area
IFR operations are prohibited in the following regions:
1) North of 72° North latitude, at all longitudes
2) South of 70° South latitude, at all longitudes
3) North of 65° North latitude between longitude 75° W and 120° W (Northern Canada)
4) North of 70° North latitude between longitude 70° W and 128° W (Northern Canada)
5) North of 70° North latitude between longitude 85° E and 114° E (Northern Russia)
6) South of 55° South latitude between longitude 120° E and 165° E (A region south of
Australia and New Zealand)
Loss of heading may occur when operating in these regions.
2.6 Magnetic Variation Operational Area
IFR operations are prohibited in areas where the magnetic variation is greater than 99.9 degrees East
or West.
2.7 Navigation Angle
The Magnetic/True Navigation Angle (as selected on the System Units page) must match the
navigation angle selected on all interfaced GPS/SBAS navigators.

190-01754-01 Rev. 5 AFMS or Supplemental AFM for the Garmin G3X Touch EFIS
FAA Approved Page | 2-3
2.8 ADAHRS Systems Status
Valid air data, attitude, and heading must be displayed on the G3X Touch PFD and Standby
Instruments for IFR operations. Refer to Section 2.24, Kinds of Operations, for specific equipment
requirements for VFR and IFR. IFR operations are prohibited if any of the following System Status
Messages are displayed:
AHRS not receiving GPS data
AHRS not receiving air data
AHRS not receiving magnetometer data
2.9 Aerobatic Maneuvers
Do not conduct aerobatic maneuvers if uninterrupted attitude information is required on the PFD.
Refer to Section 3.2, Attitude Failure (GSU 25), if the amber AHRS ALIGN caution is displayed on
the PFD.
2.10 Other Autopilots
On aircraft with an autopilot other than a GFC 500, the pilot must select FPL Source to External on
the PFD when using the autopilot in navigation (NAV or APR) modes. For those aircraft, it is
prohibited to use the autopilot in navigation modes when FPL Source is selected to Internal on the
PFD.
NOTE
Refer to the approved Airplane Flight Manual Supplement for the non-Garmin autopilot
system (if installed) for information on modes of operation.
2.11 Synthetic Vision
The synthetic vision presentation must not be used as the sole reference for aircraft control (without
reference to the primary flight instruments).
The synthetic vision presentation must not be used as the sole reference for navigation or
obstacle/terrain/traffic avoidance.
2.12 Moving Maps
Moving map displays (ownship position relative to map features) must not be used as the primary or
sole means of navigation or course guidance.
2.13 Terrain Display
Maneuvers and navigation must not be based solely on the display of terrain or obstacles on the
moving map terrain displays.
2.14 Terrain Alerts
Terrain alerts must be inhibited when landing at an airport that is not in the airport database.
2.15 Traffic Display
The display of traffic is intended as an aid to visual acquisition and must not be used as the sole basis
for aircraft maneuvering.

AFMS or Supplemental AFM for the Garmin G3X Touch EFIS 190-01754-01 Rev. 5
Page | 2-4 FAA Approved
2.16 Surface Operations
SafeTaxi or Chartview functions shall not be used as the sole basis for ground maneuvering. SafeTaxi
and Chartview functions do not comply with the requirements of AC 20-159 and are not qualified to be
used as an airport moving map display (AMMD). SafeTaxi and Chartview use is limited to airport
surface orientation to improve flight crew situational awareness during ground operations.
2.17 Glide Range Ring
In the event of engine failure or engine malfunction, the Glide Range Ring must not be used to
determine gliding distance. Refer to the airplanes’ Pilot’s Operating Manual / Airplane Flight Manual
for engine failure emergency procedures and glide distance data.
2.18 Powerplant Gauge Markings
Aircraft that were previously equipped with a fuel flow gauge which measured metered fuel pressure
may have this gauge replaced by a gauge which measures fuel flow directly. When these gauges
are replaced in accordance with this STC, the fuel pressure and fuel flow markings on such gauges
are replaced by equivalent fuel flow markings.
Fuel flow values may be in error by as much as 15% if the K factor calibration is improperly set. Do
not depend solely on the fuel flow indication or the fuel totalizer to determine fuel used, fuel remaining,
or fuel reserves.
The fuel computer functions must not be used as the primary means of determining the quantity of
fuel in the tanks.
The Manifold Pressure gauge and the Propeller RPM gauge are the primary means for setting engine
power. The Engine Power display is for information purposes only.
2.19 Weight and Balance
Weight and balance data provided by the G3X Touch is for flight planning purposes only. Consult
the aircraft’s Pilot’s Operating Handbook for the official weight and balance data.
2.20 Data link Products (SiriusXM, FIS-B, and Connext)
Do not use data link weather information for maneuvering in, near, or around areas of hazardous
weather. Information provided by data link weather products may not accurately depict current weather
conditions.
Do not use the indicated data link weather product age to determine the age of the weather information
shown by the data link weather product. Due to time delays inherent in gathering and processing
weather data for data link transmission, the weather information shown by the data link weather
product may be significantly older than the indicated weather product age.
Do not rely solely upon data link services to provide Temporary Flight Restriction (TFR) or Notice to
Airmen (NOTAM) information. Not all TFRs and NOTAMS may be depicted.
2.21 Glove Usage
No device or apparel may cover the pilot’s fingertips used to operate the G3X Touch display.
2.22 Service Required
It is prohibited to initiate flight when a “Service Required” advisory is present on the PFD, MFD, or EIS
display.