97-55 Garmin GTX 330 ES Transponder Installation
NOTE
Refer to Garmin GTX 330 ES Maintenance Manual and
Instructions for Continued Airworthiness.
A. Description of New Features
Automatic Dependent Surveillance-Broadcast (ADS-B) "Out" equipment transmits
aircraft specific-data and position information to air traffic control via GPS-based
surveillance (rather than radar-based surveillance). ADS-B Out equipment will be
required for R66 operation in certain airspace in the United States after January 1,
2020. ADS-B "In" equipment receives data from other aircraft or from air traffic
control. ADS-B In equipment is not required for R66 operation in the United States.
The R66 may be equipped with ADS-B Out or with ADS-B Out and ADS-B In systems.
Both ADS-B systems operate mostly automatically. ADS-B equipment is programmed
with aircraft specific-data at installation. ADS-B systems use the primary installed
GPS for position information. Additional flight-specific data is entered by the pilot
using transponder controls. ADS-B data is transmitted via the transponder's Extended
Squitter (ES) on frequency 1090 MHz.
The ADS-B In system receives data via a receiver on frequencies 978 MHz and 1090
MHz. Received data is displayed on the primary GPS screen.
ADS-B Out equipment (transponder and primary GPS) or ADS-B Out and ADS-B In
equipment (transponder, primary GPS, and receiver) must have power and must be
in normal operating modes for systems to function properly. ADS-B Out system
faults are annunciated on the transponder and primary GPS screens. ADS-B In
system faults are annunciated on the primary GPS screen.
Change of aircraft registration may require ADS-B equipment programming by
qualified maintenance personnel.
Refer to R66 Pilot's Operating Handbook Section 9 for additional information.
B. Schematic
Refer to Figure 98-11 for C804-15 transponder & blind encoder electrical schematic.
C. Removal
1. Turn battery switch off and pull out XPDR (5 amp) circuit breaker on circuit
breaker panel.
2. Loosen radio key securing C804-15 transponder to avionics tray.
3. Carefully unplug/remove transponder from tray.
Page 97.22 Chapter 97 Avionics APR 2019
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