Garmin GFC 600H Maintenance Manual page 147

6. Press and hold TRIM fore and verify that the cyclic follows the trim command. If it does not, first
verify switch wiring and then confirm servo installation. Press FTR to reset the command and
move the controls back to neutral.
7. Press and hold TRIM right and verify that the cyclic follows the trim command. Again, if it does
not, first verify switch wiring and then confirm servo installation.
8. Repeat for TRIM aft and TRIM left control.
9. Repeat steps 4 through 6 for co-pilot controls.
Calibration Range Check
1. Apply external hydraulic power to the rotorcraft (in accordance with the Airbus AS350 B2/B3
AMM 29-00-00) and ensure that all controls move without undue force as they would under
normal operational conditions.
CAUTION
Ensure the GFC 600H system is powered and operational before attempting this
configuration checkout. Moving the controls quickly while the servos are unpowered can
lead to damage of the shear fuses.
2. Press the FCS key on the GMC to engage the system after successfully completing the pre-flight
test.
3. The GMC 605H FCS status indication light should illuminate green.
4. Press and hold FTR / FCS ENG. Slowly move the cyclic and pedals systematically through the full
range of control. First move pitch fore/aft followed by roll left/right. Likewise, input full left pedal
followed by full right and return the controls to neutral. If the system fails while performing this
check, one or more of the servos were not calibrated to their full range of motion. Return to
Section 7.2.1 for details on calibrating the range for each installed servo.
8.3.2.3 GFC 600H Mode Operation Tests
Level Engagement
1. Press the LVL key on the GMC 605H.
2. Verify the following:
• "R", "Y", and "P" are displayed on the GMC 605H. "Y" will only be displayed if yaw is
installed.
• Verify the pitch and roll annunciation fields on the GDU and GMC display "LVL / LVL".
3. Press the nose down pitch beep with LVL / LVL active.
4. Verify LVL/LVL is canceled. The system is now engaged in a basic ATT hold. If a GTN is
installed and GPS is valid, the system should display "GSPD/GSPD" in the pitch roll fields.
5. Repeat steps 1 through 4 using the pilot and co-pilot cyclic mounted LVL switch (if installed).
FTR /FCS ENG Switch
6. While holding the cyclic, press and hold the FTR switch.
7. Verify the following annunciations and displays:
• "FTR" is displayed on the GMC
• "FTR" is displayed on the PFD in black text with white background
8. Release the FTR switch.
190-02081-03
Rev. 3
GFC 600H HFCS Part 27 STC Maintenance Manual
Page 8-5