Gdc Software Installation And Testing - Garmin G1000 Maintenance Manual

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It is important that the "time equals zero" moment corresponds with the
moment the PFD first displays the blinking TEST COMPLETE message.
The operator should carry out the actions called for in the prepared test
sequence.
It is important that all actions are carried out in the order and at the precise elapsed time as
specified in the prepared test sequence. When the operator has completed the actions specified
in the test sequence, press the ENTER button to indicate that the process is complete. When
this is done, the TEST COMPLETE field stops blinking. The PFD informs the operator if the
installation has passed or failed the magnetometer interference test. If the test passes, no
further action is required for this test.
If the test fails, the installation should be considered unreliable until the source of magnetic
interference is identified and remedied. When the magnetometer interference test fails, record
the three magnetometer maximum deviation values and their corresponding timestamps. Any
maximum deviation value greater than 2.5 milliGauss indicates a problem that must be
resolved. Compare the corresponding timestamps with the prepared test sequence to identify
which action produced the problem. Contact Garmin for assistance in resolving the problem.
Two common reasons for a failed magnetometer interference test are: 1)
new equipment is installed in close proximity to the GMU 44
magnetometer, and 2) an existing or new electronic device has become
grounded through the aircraft structure instead of via the proper ground
wire in a twisted shielded pair.
Press the ENT key on the PFD to conclude this procedure.
Test
Verify attitude and heading, on PFD in normal mode.
7.6

GDC SOFTWARE INSTALLATION AND TESTING

Original GDC is Reinstalled:
No software or configuration loading is required if the original GDC is reinstalled. This does not
include units that were returned for repair as their software and configuration files are deleted
during the repair testing process.
New, Repaired or Exchange GDC is Installed:
Ensure that the correct airframe type is selected before proceeding; otherwise,
incorrect configuration information will be loaded.
If a new, repaired or exchange GDC 74 is installed, load the following files after removing the
Supplemental Database cards from the bottom slots of each display. Note which card was
removed from the MFD so it may be identified later for reinsertion in the MFD when software
and configuration loading is complete. It contains a FliteChart® or ChartView database which is
only used by the MFD. Reinstall all the cards after the software and configuration file loads are
complete.
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GDC1 Software
G1000 System Maintenance Manual
190-00907-00
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Page 7-27
Rev. B