190-02081-03
GFC 600H HFCS Part 27 STC Maintenance Manual
Rev. 3
Page 7-5
7.3 Collective Position Sensor
Removal, replacement, and re-installation of the collective position sensor requires range of motion
calibration.
The following procedure will be performed with electrical power applied to the rotorcraft and the
GMC605H in Configuration mode:
1. Apply external power to the rotorcraft and avionics system.
2. Start the GMC 605H in Configuration mode in accordance with Section 3.3. Press the
HDG
button
when “CONT” is displayed on the GMC 605H.
3. Navigate to the GFC
' COLL SNSR
page.
4. Using the scroll wheel, highlight START under the BEGIN CALIBRATION and press the
VS
key.
5. Move the collective lever to the full up and full down positions per the calibration instructions on
the GMC 605H display.
6. Press the
VS
key to save the calibration.
7. After the GMC 605H has reported a successful calibration, confirm the calibration setting:
a. Move the collective lever to full up position; the GMC 605H should display “COLL: 100%”.
b. Move the collective lever to full down position; the GMC 605H should display “COLL: 00%”.
Continue to Section 1 for pre-flight and functional check of the GFC 600H FCS.