Garmin GTX 33, Installation Manual, Page: 63 / 83

190-00906-00 GTX 33 Installation Manual
Rev. F Page B-11
51. 8.4.1
The requirements on horizontal posi-
tion data sources are based on the
ED-126 safety and
performance assessments.
[General information, no
compliance statement req’d]
52. 8.4.2
Components of horizontal
position data sources external to the
aircraft ADS-B system (such as the
GNSS space segment) fall outside
these airworthiness
considerations. Such external compo-
nents are assumed to
operate in accordance with
their specified nominal
performance.
Nevertheless, failures of the
external data source components are
required to be detected through on-
board monitoring (as
expressed in section 8.4.3).
[General information, no
compliance statement req’d]
53. 8.4.3
Any eligible horizontal position data
source needs to meet the
following minimum requirements
(refer also to Table 2 in
Appendix 3):
• Correct encoding of quality
indicator information in line with the
actual performance of the selected
horizontal position data source(s), i.e.
in relation to position integrity contain-
ment bound (ED-102/DO-260 and
DO-260A ADS-B transmit systems)
and position accuracy (DO-260A
ADS-B transmit systems);
• Position source failure probability:
10
-4
per hour;
• Position integrity alert failure proba-
bility, commensurate with the perfor-
mance
characteristics of GNSS integrity
monitoring: 10
-3
(per position source
failure event);
• Position integrity time to alert: 10
seconds.
• “Correct encoding” -The GTX 33
encoding is compliant with DO-
260A.
Garmin GNS/GTN Equipment:
• "Position source failure
probability" - This requirement is
met by the GPS/SBAS system and
is not applicable to the GPS posi-
tion equipment itself.
• “Position integrity alert failure
probability” - missed alert
probability is 10
-3
/hr in all modes.
• “Position integrity time-to-alert” –
the 10 second position integrity
time to alert is met in all modes.
Other:
Table B-1. Version 1 ADS-B Field Approval Compliance Matrix
Item #
AMC
Section #
AMC Item Compliance Summary