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(2023) Service Bulletin 23114 Rev A: Approval of GPS 175/GNX 375/GNC 355 Main Software Version 3.22
PRODUCTS AFFECTED:
GPS 175/GNX 375/GNC 355 units installed using Part 23 AML STC SA02636SE are affected.
CERTIFICATION AUTHORIZATION:
STC SA02636SE MDL Revision 17
COMPLIANCE:
Recommended: Compliance with this service bulletin is recommended at the next maintenance interval.
DOCUMENTATION CONSIDERATIONS:
As a result of changes related to this update, the applicable documents listed in Table 1 are required to be issued to the aircraft operator/owner before the aircraft is returned to service.
Table 1
| Document Title | Part Number | Revision (or later) |
| GPS 175/GNX 375/GNC 355 Part 23 AML STC Maintenance Manual with Instructions for Continued Airworthiness | 190-02207-A2 | 3 |
| Airplane Flight Manual Supplement or Supplemental Airplane Flight Manual for the Garmin GPS 175/GNX 375/GNC 355 GPS/XPDR/COM Navigation System | 190-02207-A3 | 4 |
PURPOSE:
This STC Service Bulletin provides notification of an update to FAA AML STC SA02636SE, GPS 175/GNX 375/GNC 355, MDL Revision 17.
MDL Revision 17 updated GPS 175/GNX 375/GNC 355 main software to version 3.22. This software update fixes an issue where the traffic output via Bluetooth interface to non-Garmin PED is interrupted when 27 or more traffic targets were present.
There are no new aircraft models or functionality being added to the STC SA02636SE.
WARRANTY INFORMATION:
This modification is warranty reimbursable for the manpower listed above, with a deadline of May 31, 2024.