GTX 320/320A Installation Manual
Page 3
190-00133-01
Rev L
1.4.2 Installation Accessories
ITEM
GARMIN P/N
Mounting Rack
115-00285-00
Connector Kit
011-00651-01
Rear Backplate
011-00677-01
Mounting Rack, Rear Backplate and Connector Kit
(Includes 115-00285-00, 011-00677-01 and 011-00651-01)
010-10161-01
GARMIN GTX 320/320A Narco Adapter
010-10158-00
GARMIN GTX 320/320A KT76A Adapter
010-10159-00
GARMIN GTX 320/320A Antenna kit*
010-10160-00
*
Note
: A transponder antenna approved to TSO C66( ) or C74( ) that has been installed to meet the
requirements of this manual may be approved for use with the GTX 320/320A.
1. 5
ADDITIONAL EQUIPMENT REQUIRED
•
Antenna Sealant - Use antenna manufacturer’s instructions, install according to FAA
AC 43.13-2A.
•
Cables - The installer will supply all system cables. Cable requirements and fabrication is
detailed in Section 2 of this manual.
•
Hardware - #6 Flat Head Screw (6 ea.) and #6-32 Self Locking Nut (6 ea.). Hardware required to
mount installation rack is not provided.
1.6
INSTALLATION APPROVAL
The conditions and tests required for TSO approval of the GTX 320/320A Transponder and antenna are
minimum performance standards. It is the responsibility of those desiring to install this transponder and antenna
either on or within a specific type or class of aircraft to determine that the aircraft installation standards are
within the TSO standards. The GTX 320/320A and antenna may be installed only if further evaluation by the
applicant documents an acceptable installation and is approved by the administrator. For GTX 320/320A TSO
compliance, see Appendix A. For antenna TSO compliance, refer to antenna manufacturer’s literature.
1.7
ATC TRANSPONDER TESTS AND INSPECTIONS
The ATC transponder tests required by 14 CFR, Part 91.413 may be conducted using a bench check or portable
test equipment and must meet the requirements prescribed in Part 43 Appendix F.
If portable test equipment with appropriate coupling to the aircraft antenna system is used, operate the test
equipment for ATCRBS transponders at a nominal rate of 235 interrogations per second to avoid possible
ATCRBS interference. An additional 3 dB loss is allowed to compensate for antenna coupling errors during
receiver sensitivity measurements conducted in accordance with Part 43 Appendix F, Paragraph (c)(1) when
using portable test equipment.
