G900X/G950 Installation and Maintenance Manual – GIA 63W
Page 4-13
190-00719-00
Revision D
TSO/ETSO Deviations, continued
TSO/ETSO Deviation
1. Garmin was granted a deviation from ETSO-2C38e to use DO-160E instead of DO-
160D.
ETSO-2C38e
2. Garmin was granted a deviation from ETSO-2C38e to use ED-23B amendment 3 in
addition to ED-23B.
TSO-C40c
1. Garmin was granted a deviation from TSO-C40c to use DO-160E instead of DO-160B,
and DO-178B instead of DO-178A.
ETSO-2C40c 1. Garmin was granted a deviation from ETSO-2C40c to use DO-160E instead of DO-
160D.
1. Garmin was granted a deviation from SAE AS 8008 paragraph 3.6 to limit flight director
operation to attitudes considered safe for the certified aircraft.
TSO-C52b
2. Garmin was granted a deviation from TSO-C52b to use DO-160E instead of DO-160C.
1. Garmin was granted a deviation from ETSO-C52b to use DO-160E instead of DO-160D.
ETSO-C52b
2. Garmin was granted a deviation from AS-8008 paragraph 3.6 to limit flight director
operation to attitudes considered safe for the certified aircraft.
1. Garmin was granted a deviation from TSO-C145a to use DO-160E instead of DO-160D.
2. Garmin was granted a deviation from RTCA/DO-229C paragraphs 2.1.1.10, 2.1.1.7,
2.1.1.8.1, 2.1.1.8.2, 2.1.1.9, 2.1.2.1, 2.1.3.1, 2.1.4.1.4, 2.1.4.1.5 and 2.1.5.1 in the form of
an operational limitation to achieve an equivalent level of safety. This operational limitation
applies to the GIA63W with GPS software version 2.40 or earlier, or GIA63W installations
with certain models of GPS/WAAS antennas identified in Section 2.1.3.2. The operational
limitation is based on:
1. The ability to use antennas that may not meet the minimum gain performance
requirements of DO-228.
2. The ability to mitigate the effects of the different gain characteristics of those
antennas by increasing the effective mask angle through operational limitations.
3. The ability to further increase the effective mask angle, through operational
limitations, to a level commensurate with test conditions used in the original TSO
qualification tests.
4. The ability to use -128 dBmic as the minimum GPS satellite signal-in-space for
the purpose of assessing the operational limitation.
5. The ability to use -128 dBmic as the minimum SBAS satellite signal-in-space for
the purpose of assessing the operational limitation.
TSO-C145a
3. Garmin was granted a deviation from RTCA/DO-229C paragraph 2.1.1.9 to use a 20
second satellite reacquisition time instead of a 10-second reacquisition time.