97-53 Garmin GTR 225B COM Radio Installation
Refer to R66 Illustrated Parts Catalog (IPC) Figure 97-23.
NOTE
Refer to Garmin GTR 225B Maintenance Manual and Instructions
for Continued Airworthiness.
A. Description of New Features
The new C802-2 COM radio (Garmin GTR 225B) includes similar communication
features available in the earlier R66 COM radio (KY196A [28V]), but also includes an
airport frequency database, ability to monitor the standby frequency, and improved
user memory channel functionality. The new COM radio is a dual voltage unit, suitable
for use in 14V and 28V systems.
B. Schematic
Refer to Figure 98-9 for C802-2 COM Radio Installation electrical schematic.
C. Removal
1. Turn battery switch off and pull out COM radio (5 amp) circuit breaker at panel.
2. Loosen radio key securing C802-2 COM radio to avionics tray.
3. Carefully unplug/remove radio from tray.
D. Installation
1. Turn battery switch off and pull out COM radio (5 amp) circuit breaker at panel.
2. Carefully plug-in/install C802-2 COM radio in appropriate location in avionics tray.
3. Tighten radio key securing radio to tray. Verify equipment security.
4. Push in COM radio (5 amp) circuit breaker at panel. Turn battery & avionics
switches on.
5. Perform appropriate functional checks per Garmin GTR 225B Pilot's Guide. Turn
battery & avionics switches off.
E. Antenna
Refer to § 6-80 for antenna locations and R66 Illustrated Parts Catalog (IPC) Chapter 6.
NOTE
Antenna installation depends on number of COM installations
and additional equipment installed.
Page 97.18 Chapter 97 Avionics MAY 2015
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