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Aviation Alerts and Advisories

Approval of GNC 355 GPS/Comm Radio in an Approved Model List of Part 23 Aircraft


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.


STC SA02636SE MDL Revision 5


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


MDL revision 5 includes the following changes:

  • Added the GNC 355 and GNC 355A to the STC
  • Updated the GPS 175 and GNX 375 to main software version 3.02:
    • Corrected incompatibility issue with KI 208A and KI 209A
    • Corrected issue for GNX 375 with use of “Generate ICAO from Tail” in config mode, feature will now correctly calculate ICAO address
    • Changed default of user fields on the map to combined DTK/TRK (Desired Track / Track) in top right and DIS/BRG APT (Distance/Bearing from Destination Airport) in bottom right

ASDN Service Bulletin 1959 Rev A