Garmin GTN 6 series Maintenance Manual - page 65
190-01007-B1
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Rev. 1
Page 6-1
6 RETURN TO SERVICE
This section provides return-to-service procedures to be followed after removal and reinstallation or
replacement of equipment comprising part of or interfaced to the GTN 6XX/7XX. After conducting all of
the required return-to-service procedures in accordance with this section, the craft may be returned to
service.
6.1 Maintenance Records
Record the following information in the appropriate rotorcraft maintenance logs:
•
Version number(s) of software loaded during maintenance
•
Part and serial numbers of any equipment replaced
•
Database updates performed during maintenance
•
Other relevant rotorcraft maintenance information
6.2 Return-to-Service Procedures
6.2.1
GTN 6XX/7XX
Original GTN 6XX/7XX Reinstalled
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.
See Section 6.3.2.1.
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.
NOTE
The steps in the following procedure are applicable to all GTN models unless otherwise
noted in the individual steps.
1. Complete the COM configuration procedure described in Section 6.3.1.1. (GTN 635/650/750
only).
2. Complete the VOR/LOC/GS configuration procedure in Section 6.3.5.1.2 (GTN 650/750 only).
3. Complete the GTN ground checks described in Section 6.3.2.
4. Complete the VOR/ILS/GS indicator ground checks described in Section 6.3.5.2.2 (GTN 650/750
only).
5. Complete the appropriate interface checks in Section 6.3.6.2.
6. Ensure that the Basemap, Navigation, SafeTaxi, and Obstacle databases are up to date in
accordance with Section 3.4.
7. Insert the SD card from the original GTN into the replacement unit (GTN 6XX/7XX).