COMPLIANCE:
Mandatory: This Service Bulletin is mandatory only for GTX 328 units installed with a Garmin GTN 6XX/7XX unit, where the GTN 6XX/7XX unit provides control of the GTX 328.
Optional: For all other installations this Service Bulletin may be incorporated at the owner's expense.
PRODUCTS AFFECTED:
This bulletin is applicable to GTX 328 units with Software Version 7.03 or previous software versions. The GTX 328 current software version is displayed at power up, on the unit’s front panel.
PURPOSE:
This Service Bulletin incorporates new unit Software Version 7.04 for GTX units. Software Version 7.04 incorporates the below functionality.
- Ensures proper function of devices connected to the GTX via RS-232
- Ensures proper initialization of standby mode at power-on when an external standby input is used.
- Ensures Flight ID changes are properly transmitted to ATC