Garmin GTX 330 Installation Manual page 83

AMC
Item #
Section #
The transponder should indicate correctly the
altitude resolution (quantisation) used, i.e. 25ft
(from an appropriate source, default resolution)
or 100ft (Gillham's coded source, permissible
alternative resolution).
65. 8.5.3
The conversion of Gillham's coded data to
another format before inputting to the
transponder is not permitted unless failure
detection can be provided and the resolution
(quantisation) is set in the transmitted data to
indicate 100ft.
In case more stringent barometric altimetry
requirements are applicable in line with
airspace requirements (e.g. RVSM) or other
66. 8.5.4
function requirements (e.g. ACAS II), then
these requirements and their related regulation
take precedence.
67. 8.6 Aircraft Identification
Identification needs to be provided to the ADS-
B transmit system so that the information is
identical to the filed ICAO flight plan. This
information may be provided from:
• A flight management system; or
68. 8.6.1
• A pilot control panel; or
• For aircraft, which always operate with the
same flight identification (e.g. using registration
as the flight identification) it may be
programmed into equipment at installation.
In case no ICAO flight plan is filed, the Aircraft
69. 8.6.2 Registration needs to be provided to the ADS-B
transmit system.
Special Position Identification (SPI)
For ATC transponder-based ADS-B transmit
systems, the SPI capability needs to be
70. 8.7
provided. The SPI capability should be
integrated into the transponder functionality and
should be controlled from the transponder
control panel.
71. 8.8 Emergency Status/Emergency Indicator
When an emergency status (i.e. discrete
emergency code) has been selected by the flight
72. 8.8.1
crew, the emergency indicator needs to be set
by the ADS-B transmit system.
190-00207-02
Rev. U
Table B-1 Compliance Matrix
AMC Item Compliance Summary
Per Section 4.4 of this manual,
GTX 330 reports altitude in 25-foot
increments when altitude is
provided serially, and 100-foot
increments when altitude is
provided from parallel wire gray
code inputs. Altitude resolution is
Supported in BDS (6,5) Aircraft
Operational Status.
Conversion of Gillham (gray)
coded altitude data to serial data is
not authorized.
[General information, no
compliance statement req'd]
[Section heading, no compliance
statement req'd]
Flight ID is programmed as part of
the transponder configuration, and
may also be manually configured
by the pilot.
Flight ID is programmed as part of
the transponder configuration.
The IDENT key is available to the
pilot on the GTX 330. A remote
mounted IDENT button may also
be installed.
[Section heading, no compliance
statement req'd]
The Mode A code is monitored for
correspondence to an emergency
code.
GTX 330/330D Installation Manual
Page B-11