System Maintenance Manual

G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 4-27
190-00682-01 Revision F
Figure 4-6 GFC Status Page
IMPORTANT!
It is highly recommended that the following test be performed at temperatures
between 50° F and 120° F.
3. Use the FMS knob to select the desired servo (PITCH, ROLL, or YAW).
4. Verify that the aircraft control surface to be checked is free to travel throughout its range of motion.
5. Manually select +2.50 rpm for the Drive Servo and press ENT.
6. Press the ENG CLCH softkey.
7. Press the DRV SRVO softkey. During operation of the servo, observe the CURRENT field and
verify that the current displayed varies during operation.
IMPORTANT!
Once the test starts the servo will begin to move the aircraft controls. If the test must be
stopped, firmly grasp the aircraft control being moved and press the red AP DISC switch
on the aircraft control stick.
8. Allow the selected servo to drive the control surface to either the NOSE DOWN stop (Pitch) or the
LEFT stop (Roll and Yaw). If the Pitch servo is selected, firmly hold the control yoke in the full
forward position until the NOSE DN test is completed.
9. Manually select 0.00 rpm for the Drive Servo and press ENT. Allow the servo to stop.
10. Firmly grasp the aircraft control under test and press the DIS CLCH softkey.
11. Press the STP SRVO softkey.
12. Repeat steps 2 through 10 for each servo axis shown.