97-57 Electrical System Installation
A. Description of New Features
1. Main Switch Panel
The main switch panel is located at the top of the avionics stack. Rocker-
style switches are utilized for ergonomic comfort for this new location, and for
the new console geometry (earlier R66s utilized paddle-style switches). Some
secondary instruments such as OAT and clock and hourmeter are also relocated.
B. Schematic
Refer to Figure 98-13 for F024 electrical system schematic.
97-58 Intercom System Installation
NOTE
Refer to Garmin GMA 350H series Maintenance Manual and
Instructions for Continued Airworthiness.
A. Description of New Features
The new Garmin GMA 350H audio control includes improved squelch and background
noise suppression, 3D audio (if stereo headsets are used) which allows inputs from
separate radios to sound as if they are coming from separate locations around
the listener, and some control functions via voice command when a momentary
pushbutton switch is depressed on the pilot's cyclic grip.
B. Schematic
Refer to Figure 98-14 for F060 Intercom System Installation (Garmin GMA 350H
Audio Control) electrical schematic.
C. Removal
1. Turn battery switch off & pull out ICS (5 amp) circuit breaker on circuit breaker panel.
2. Loosen radio key securing Garmin GMA 350H audio control to avionics tray.
3. Carefully unplug/remove audio control from tray.
D. Installation
1. Turn battery switch off & pull out ICS (5 amp) circuit breaker on circuit breaker panel.
2. Carefully plug-in/install Garmin GMA 350H audio control in appropriate location
in avionics tray.
3. Tighten radio key securing audio control to tray. Verify equipment security.
4. Push in ICS (5 amp) circuit breakers on circuit breaker panel. Turn battery &
avionics switches on.
5. Perform appropriate functional checks per Garmin GMA 350H series Pilot's Guide.
Turn battery & avionics switches off.
APR 2019 Chapter 97 Avionics Page 97.27
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