Garmin GI 275 Installation Manual page 20

1 GI 275 DESCRIPTION
1.1 STC Applicability .............................................................................................................................1-2
1.2 System Overview ..............................................................................................................................1-3
1.2.1 Model Specifics..........................................................................................................................1-6
1.2.2 Functions ....................................................................................................................................1-7
1.3 Equipment.......................................................................................................................................1-14
1.3.1 Display Sensors ........................................................................................................................1-14
1.3.2 Engine Sensors .........................................................................................................................1-15
1.3.3 Other Equipment ......................................................................................................................1-17
1.4 System Architecture Example ........................................................................................................1-18
This installation manual is intended for use by those authorized to perform maintenance and/or avionics
installations on approved aircraft. This manual only approves the installation of the GI 275 Base (including
backup battery and backup GPS antenna), GSB 15, and GEA 24 (including EIS annunciator(s) and engine
sensors). Other compatible LRUs listed in Appendix C must use other installation approvals and may
require installation and/or configuration by an authorized Garmin dealer per Garmin's installation policy. It
includes installation data and checkout procedures for the GI 275 Multi-Function Instrument and refers to
standards described in Title 14 CFR Part 43. Installation personnel must be familiar with the contents of
this manual prior to performing modifications to the aircraft.
This manual can only be used to install the Base variant of the GI 275 as an MFD and/or EIS display(s) in
Class I & II aircraft only. This manual cannot be used to install a GI 275 in aircraft considered to be
Class III or IV.
Installations of a GI 275 ADAHRS unit or ADAHRS+AP unit must use GI 275 Part 23 AML STC
Installation Manual (P/N 190-02246-10) for installation guidance.
Terms frequently used in this manual include:
•
GI 275: Unless otherwise specified, refers equally to all variants of the GI 275
•
Metal aircraft: Aircraft with an aluminum (metallic) airframe, including exterior skin
•
References made to HSDB and Ethernet are used interchangeably
•
Non-metal aircraft: Aircraft with an airframe constructed from wood or composite, including
exterior skin, or aircraft with metal tubular truss airframe and fabric or composite exterior skin
•
Primary EGT: Is the exhaust gas temperature that is displayed independently from the exhaust
gas temperature associated with each cylinder. This is typically a probe installed downstream in
the exhaust to detect temperature from multiple cylinders and is used for EGT limitations in some
aircraft
•
X: An "X" denotes variations of LRUs. Examples include:
◦ "GTN 6XX" refers to the GTN 625/635/650
•
( ): Parenthesis denote an undetermined value. Examples include:
◦ "GI ( )" refers to GI 1, GI 2, etc. depending on the context
•
Throughout this manual references will be made to aircraft class. With regards to usage in this
manual, the classes are defined as follows:
◦ Class I: Single reciprocating engine airplane with GTOW of 6,000 lbs or less
◦ Class II: Multi reciprocating or turbine engine airplane with GTOW of 6,000 lbs or less
Refer to AC 23.1309-1E for more information on airplane classes
190-02246-14
Rev. 11
GI 275 STC EIS & MFD Installation Manual
Page 1-1