Gfc 700 Pre-Flight Test And Troubleshooting - Garmin CIRRUS PERSPECTIVE SR20 Line Maintenance Manual

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5.16.2 GFC 700 Pre‐Flight Test and Troubleshooting
This section helps the technician determine why the GFC 700 Pre‐Flight Test (PFT) indicated by
the red PFT annunciation has failed. The PFT is performed by both GIA's at system startup, and
needs to pass on both GIA's before the autopilot can be engaged.
The PFT is only started if the AHRS has aligned, the GIA's and servos are configured, and the
certification gains are valid. If the PFT does not complete after one minute after initialization, it
will fail.
After the system PFT has passed, it will be performed again if a servo resets, if the autopilot
servo breaker is reset, or if the cross‐side GIA restarts it.
The PFT failure fault is logged in the GIA Maintenance Log and not in the Servo Maintenance
Logs unless the GIA log fault identifies a servo problem.
Thoroughly understanding the operation of the system in
configuration mode before starting this procedure. The GFC
Status Page may be used to check the status of the servos as an
aid in troubleshooting.
To access the GIA and GSA/GTA Maintenance Logs
1. Start the system in configuration mode.
2. Use the FMS knob on the PFD to display the Diagnostics Terminal Page in the system
group. This page allows the technician to view maintenance logs associated with the
GFC 700.
3. Choose 'GIA 1' or 'GIA 2' in the LRU window.
4. In the SERVO window, choose 'NONE' to view the GIA Maintenance Log, or choose a
servo to view their logs.
5. Using the FMS knob, choose 'VIEW MAINTENANCE LOG' in the COMMAND window.
6. Press the ENT key.
7. When the Maintenance Log data starts to display in the OUTPUT window, you may see
"More...press any key to continue..." at the bottom of the OUTPUT window. This
informs you there is more data to display and the system has paused allowing you to
view the data before continuing. To see more of the data, reselect the "VIEW
MAINTENANCE LOG" in the COMMAND window and press the ENT key. The "...press
any key to continue..." function is not active at this time.
8. Scroll through the OUTPUT list by pressing the OUTPUT softkey.
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Cirrus Perspective™ Line Maintenance Manual
190-00920-00