Skip navigation links
Unsupported Browser Detected – For best results, please update your browser.

Aviation Alerts and Advisories

GPS 175/GNX 375/GNC 355 Main Software 3.10


GPS 175, GNX 375, GNC 355, or GNC 355A installed under the GPS 175/GNX 375/GNC 355 Part 23 AML STC SA02636SE are affected.




Optional: This STC Service Bulletin may be incorporated at the owner’s discretion and is not warranty reimbursable.


This STC Service Bulletin provides notification of an update to the AML STC SA02636SE Master Drawing List revision 8 to update main software to version 3.10 and transponder software to version 2.54.

MDL revision 8 includes GPS 175/GNX 375/GNC 355 to main software version 3.10:

  • Initial airworthiness approval for database sync of Navigation, Basemap, SafeTaxi and Obstacle databases from another 2 inch navigator unit (GDU 700/1060 or GI 275)
  • Added six additional new FIS-B weather products
  • Added flight plan transfer capability on ground or in air via GI 275 to/from Garmin Pilot
  • Improved LNAV+V to allow LNAV+V vertical guidance on approaches with LPV, LP and/or LNAV/ VNAV minima, when SBAS is not available

ASDN Service Bulletin 2050 Rev A