Garmin G3X Installation Manual page 491

8. Go to the Main page in configuration mode and verify the proper TRIM ACTIVITY if the Yaw
servo is connected to an auxiliary trim motor.
a) Center the aircraft rudder trim switch to input no TRIM command. Verify the rudder trim
switch is not moving. Verify the Yaw servo is properly indicating no trim activity.
b) Use the rudder trim switch to input a yaw right TRIM command. Verify the rudder trim
switch properly moves for yaw left trim. Verify the Yaw servo is properly indicating YAW
RIGHT trim activity.
c) Use the rudder trim switch to input a yaw left TRIM command. Verify the rudder trim
switch properly moves for yaw left trim. Verify the Yaw servo is properly indicating YAW
LEFT trim activity.
d) If the rudder trim response is reversed, go to the AP CONFIG page and change the yaw
damper TRIM MOTOR DIRECTION to REVERSE, then repeat step all of step 8.
e) Finally, verify the electric trim motor responds in the proper directions using the TRIM L
and TRIM R softkeys on the AP CONFIG page.
190-01115-01 G3X/G3X Touch Installation Manual - GDU 37X Config and Post Install Checkout
Rev. AA Page 31-39