Replacing a PFD on a NAV III G1000

              When a PFD is replaced it is important the new unit is installed into the MFD position of the instrument panel first. This step is necessary to prevent loss of existing data already on the PFD configuration module. The data is used for calibration and configuring of the new unit.
We need be aware important information such as the aircraft tachometer time (tach time) is in stored on the configuration module. If the data is lost, there is no means to transfer it to the new PFD. The data must be preserved for accurate log book records and scheduling upcoming maintenance events for the airplane.

Refer to the Garmin G1000 NAV III 190-00325-00 Revision T or later line maintenance manual for the Garmin Display Unit (GDU) software installation.

  1. With the new GDU in the MFD position, insert the current SD card containing system software into the upper slot of the display.
  2. On the MFD, power the system ON in configuration mode.
  3. When the message “DO YOU WANT TO UPDATE SYSTEM FILES?” appears, press the YES soft key on the lower right corner of the display.
  4. Confirm the update is complete by pressing the ENTER key when prompted.
  5. On the PFD, power the system ON in configuration mode.
  6. Press the small FMS key to activate the cursor.
  7. Rotate the small FMS knob to highlight PFD 1 on the LRU list.
  8. On the MFD, press the small FMS knob and rotate it to highlight MFD on the LRU list.
  9. Verify the software part and version numbers match on both screens.

    1. Power system down for both screens completely
    2. Remove the SD card in the upper slot of the MFD
    3. Power the system ON for both screens in normal mode two or three times to allow complete data transfer to the new GDU.
    4. Once complete, follow the steps in the Garmin Line Maintenance Manual for GDU configuration.
    5. After the data transfer is complete, the new GDU can be installed into the PFD location.
    6. The database cards can then be placed into the lower slots and the system can be operated in normal mode.

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