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190-00906-01 GTX 23 Installation Manual
Rev. C Page 1-8
1.9.2 TSO/ETSO Deviations
Table 1-6 TSO/ETSO Deviations
TSO/ETSO Deviation
TSO-C112
1. Garmin was granted a deviation from TSO-C112 to use RTCA DO-178B instead of RTCA DO-178A.
2. Garmin was granted a deviation from TSO-C112 to use RTCA DO-160D instead of RTCA DO-160B.
3. Garmin was granted a deviation from TSO-C112 to use RTCA DO-181C instead of RTCA DO-181.
4. Garmin was granted a deviation from DO-160D, section 20.3.d.
5. Garmin was granted a deviation from DO-181C section 2.2.16.2.6.2 to not provide Mode-S Extended
Squitter for an ADS-B system (for non-ES transponders only).
ETSO-2C112b
1. Garmin was granted a deviation from DO-160D, section 20.3.d.
2. Garmin was granted a deviation from ED-73B, section 1.4.2.2 to mark the equipment's functional level on
the chassis in a location not visible when the transponder is mounted in the aircraft.
TSO-C166a
1. Garmin was granted a deviation from TSO-C166a to use RTCA DO-160D instead of RTCA DO-160E.
2. Garmin was granted a deviation from TSO-C166a to place relevant TSO marking information within the
installation manual, rather than on the equipment.
ETSO-C166a
1. Garmin was granted a deviation from ETSO-C166a to use RTCA/DO-160D instead of RTCA/DO- 160E as
the standard for Environmental Conditions and Test Procedures for Airborne Equipment.
2. Garmin was granted a deviation from ETSO-C166a, section 4.1 and 4.2 to reference the installation manual
for the equipment's ETSO compliance and class for this ETSO.
TSO-C166b
1. Garmin was granted a deviation from TSO-C166b to meet the transponder function requirements of RTCA
DO-181C instead of RTCA DO-181D.
2. Garmin was granted a deviation from TSO-C166b section 4.b to not mark the TSO number on the unit.
3. Garmin was granted a deviation from TSO-C166b section 4.c to reference the installation manual for
granted TSO deviations.
4. Garmin was granted a deviation from TSO-C166b section 4.e to reference the installation manual for equip-
ment class.