Return To Service Procedures; Gtn 6Xx/7Xx; Gtn Configuration Module; Gtn Fan - Garmin GTN 6 Series Maintenance Manual

6.2 Return to Service Procedures

6.2.1

GTN 6XX/7XX

Original GTN 6XX/7XX Re-Installed
If the removed GTN is installed in its original position, no software loading or configuration setting
changes are required. This does not include units that were returned for repair as their software and
configuration files are deleted during the repair testing progress. It is recommended to perform the
Connector Engagement Check to ensure that the GTN is properly seated to the connectors. Refer to
Section 6.3.2.
New, Repaired, or Exchanged GTN Installed
If a new, repaired, or exchanged GTN is installed, the correct software must be loaded to the unit. Some
configuration files must be set. Any enabled features such as HTAWS B or ChartView will not need to be
re-enabled if the configuration module was left in the rotorcraft. Verify configuration of the new GTN
against the configuration log and set any configuration settings that are not the same as the previously
configured unit. Refer to GTN 6XX/7XX Part 27 AML STC Installation Manual for configuration details.
NOTE
The steps in the following procedure are applicable to all GTN models unless otherwise
noted in the individual steps.
1. For the GTN 635/650/750, complete the COM Configuration Procedure described in
Section 6.3.1.
2. For the GTN 650/750, complete the VOR/LOC/GS Configuration Procedure in Section 6.6.2.
3. Complete the GTN ground checks described in Section 6.3.
4. For the GTN 650/750, complete the VOR/ILS/GS Indicator Ground Checks described in
Section 6.6.4.
5. Complete the appropriate interface checks in Section 6.3.
6. Ensure that the Basemap, Navigation, SafeTaxi, and Obstacle databases are up-to-date, as
described in Section 3.4.
7. Insert the data card from the original GTN into the replacement unit.
6.2.2

GTN Configuration Module

Original Configuration Module Re-Installed
No return to service procedures are required.
New or Exchanged Configuration Module Installed
Verify GTN configuration settings against the configuration log kept with the rotorcraft permanent record.
Refer to GTN 6XX/7XX Part 27 AML STC Installation Manual for configuration details.
6.2.3

GTN Fan

Perform the fan check in Section 6.9.
190-01007-B1
Rev. 4
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Page 6-4