Gma Software Installation And Testing - Garmin G1000 Maintenance Manual

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7.4

GMA SOFTWARE INSTALLATION AND TESTING

Original GMA Reinstalled:
No software or configuration loading is required if the original GMA 1347(X) 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 Exchanged GMA Installed:
If a new, repaired, or exchange GMA 1347 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.
• GMA Software
• GMA Configuration
•
GMA Files for optional equipment installed on the aircraft (i.e. ADF, HF radio, etc.).
7.4.1 GMA Testing
If unit is removed or replaced the following tests are recommended:
Intercom System (ICS) Check
Except for marker beacon operation, an in-aircraft checkout may be performed in the aircraft on
the ramp with known good microphone, headset, and speaker.
1. Plug in headsets at each ICS position.
2. Ensure that the MAN SQ button is off (no light).
3. Adjust volume for each position and verify that the ICS is working properly.
4. Check Pilot and Copilot ICS positions for isolation and proper operation of volume and
squelch controls.
5. Press the PA key. Verify that microphone audio is heard over the passengers headsets
when the Push-To-Talk (PTT) key is pressed.
Transceiver Operational Check
Perform a ramp test radio check by exercising the installed transceivers, microphone,
microphone key and audio over the headphones and speaker. Verify that communications are
clear and PTT operation is correct for each pilot position.
1. Select the audio source corresponding to each installed avionics unit (i.e. NAV1, NAV2,
COM1, COM2) and check for audio over the headsets.
2. Press the SPKR key and verify that the selected audio is heard over the speaker, if installed.
Failsafe Operation Check
1. Turn the GMA off by pulling the circuit breaker. This directs all COM 1 phone audio, MIC
audio and MIC key to the pilot's position.
2. Check the failsafe operation by exercising the COM 1 microphone, microphone key and
audio over the headphones. All volume control for the COM audio should be made through
the PFD volume control. Verify proper operation of COM 1 using the failsafe operation.
G1000 System Maintenance Manual
190-00907-00
Page 7-13
Rev. B