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2 INSTALLATION OVERVIEW
2.1 Introduction
This section provides hardware equipment information for installing the GTX 23 Mode S transponder,
related hardware, and optional accessories. Installation of the GTX 23 should follow the data detailed in
this manual. Cabling is fabricated by the installing agency to fit each particular aircraft. The guidance of
FAA advisory circulars AC 43.13-1B and AC 43.13-2B, where applicable, may be found useful for making
retro-fit installations that comply with FAA regulations.
Refer to Appendix D for rack drawings and dimensions.
2.2 Installation Materials
The GTX 23 is available as a single unit under the following part numbers:
GTX 23 w/ES, Unit Only, (011-02803-02)
GTX 23 w/ES and Install Kit, (011-02803-02)
2.2.1 Equipment Available
Each of the following accessories is provided separately for the GTX 23 unit. The rack and the remainder
of the accessories are required for installation.
GTX 23 Stand-Alone Install Rack
Connector Kit, GTX 23
Back-plate Assembly, GTX 23
Garmin Transponder Antenna kit*
*Note: A transponder antenna approved to TSO C66( ) or C74( ) that has been installed to meet the
requirements of this manual may be used with the GTX 23.
2.2.2 Additional Equipment Required
The following installation accessories are required but not provided:
• Cables – The installer will supply all system cables including circuit breakers. Cable requirements
and fabrication is detailed in Section 3 of this manual.
• Hardware – #6-32 x 100° Flathead SS Screw [(MS24693, AN507R or other approved fastener)
(4 ea.)] for horizontal mounting of the remote stand-alone rack.
• Hardware – #8-32 Panhead Machine Screw [(MS35206, AN526 or other approved fastener) (4 ea.)]
for vertical mounting of the remote stand-alone rack.
2.3 Installation Considerations
2.3.1 Preservation of Previous Systems
It is the installer's responsibility to preserve the essential characteristic of the aircraft being modified with
this equipment to be in accordance with the aircraft manufacturer's original design. This includes the
preservation of multiple power buses, which reduces the probability of interrupting power to essential
instruments and avionics.
GTX 23 Installation Manual
190-00906-01
Item
Item
Catalog Part Number
010-01014-02
010-01014-03
Garmin Catalog Part Number
115-00629-00
011-01012-01
011-00582-00
010-10160-00
Page 2-1
Revision A
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