Garmin GFC 600H Maintenance Manual page 67

Annunciated
Fault
• Invalid attitude data (includes
AHRS monitor and attitudes
outside the engage limits).
• Air Data inputs have failed.
YAW FAIL
• Servos Failure.
• FCS DISC, FTR, and/or Yaw
ON/OFF switch in an invalid
state.
One or more of the GFC 600H
units is not reporting the
MANIFEST
expected software and/or gains
version to the GMC 605H.
Collective Position Sensor has
COLL FAIL
failed.
<label> KEY
• FCS KEY
• FD KEY
• CPL KEY
• HDG KEY Annunciated key on the
GMC 605H is stuck in the
• NAV KEY
pressed state.
• APR KEY
• IAS KEY
• VS KEY
• ALT KEY
• LVL KEY
190-02081-03
Rev. 3
Possible Cause
GFC 600H HFCS Part 27 STC Maintenance Manual
Corrective Action
• Power cycle the GFC 600H FCS by cycling
the FCS circuit breaker.
• Ensure the GMC 605H, GFS 83 (Yaw Servo),
GSU 75H and GMU 44( ) connectors are
securely mated to the units.
• Ensure wiring is correct.
• Ensure the FCS DISC and FTR switches on
cyclic are not stuck or shorted.
• Ensure the Yaw ON/OFF switch on collective
is not stuck or shorted.
• Verify wiring of FCS DISC and FTR from
circuit breaker to switch to the GMC 605H and
GFS 83.
• Troubleshoot the GSU 75H and GMU 44( ) in
accordance with Section 5.3.
• Contact Garmin.
• Power cycle the GFC 600H FCS by cycling
the FCS circuit breaker.
• Reload software in accordance with
Section 3.3.1.
• Contact Garmin.
• Power cycle the GFC 600H FCS by cycling
the FCS circuit breaker.
• Ensure the GMC 605H, GFS 83, and
collective position sensor connectors are
securely mated to the units.
• Ensure wiring is correct.
• If message persists, replace collective
position sensor in accordance with
Section 6.7.
• Press the annunciated key to cycle its
operation.
• Power cycle the GFC 600H FCS by cycling
the FCS circuit breaker.
• If message persists, replace the GMC 605H
unit. Refer to Section 6.1 for removal of the
unit.
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