System Maintenance Manual

G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 4-21
190-00682-01 Revision G
IMPORTANT!
It is highly recommended that the following test be performed at temperatures
between 50° F and 120° F.
4. Use the FMS knob to select the desired servo (PITCH, ROLL, YAW or PITCH TRIM).
5. Verify that the PFT status field shows PASSED.
6. Verify that the aircraft control surface to be checked is free to travel throughout its range of motion.
7. Press the TEST SVO softkey on the PFD. Follow prompts to begin the test.
IMPORTANT!
If the test must be stopped, firmly grasp the aircraft control being moved and press
the red AP DISC switch on the aircraft control wheel. If an abnormal disconnect of
a servo occurs, reset the AFCS SERVO circuit breaker and repeat the test.
8. During operation of the servo, observe the CURRENT field and verify that the current displayed
varies during operation
9. When test is completed, verify the CLUTCH TEST PASS message is displayed on the MFD.
10. Repeat steps 4 through 8 for each servo axis (Pitch, Roll, Yaw and Pitch Trim).
11. If the CLUTCH TEST FAIL message is displayed on the MFD for any axis, repeat the test twice in
the failed axis. If the test does not pass, the servo gearbox must be removed from the aircraft and
tested/adjusted per the
12. Servo Adjustment Fixture Procedure in Section 4.9.3.