Current EditionVol. XL · No. 1rogerwilcoaviation.comwheels-up since 2022

FAA Part 145 Repair Station · Cert. RWSR491EAuthorizedGarminDealerAEA MemberNBAA Member

service bulletin

Garmin SB 26091A: Part 23 GTX 3X5(R) Software Approval

RWAS Avionics Desk · 2026-07-17 · Garmin Service Bulletin 26091A

AML STC SA01714WI Revision 24 approves GTX 3X5 main software 2.90 and ADS-B software 3.62.

Garmin AXIS flight displays installed in a certified-aircraft cockpit.

Garmin Service Bulletin 26091A provides the Part 23 approval path for GTX 3X5(R) transponders installed under ADS-B AML STC SA01714WI. Master Data List Revision 24 approves GTX 3X5 main software version 2.90 and ADS-B software version 3.62, with compliance optional at the owner’s discretion.

Main software 2.90 adds AXIS Flight Display interface support and improves the robustness of existing interface formats. ADS-B software 3.62 adds AXIS support, improves traffic aural-alert robustness, strengthens Bluetooth connections with Apple products and improves traffic-target handling so the most relevant targets remain prioritized even when many targets are being tracked.

Garmin identifies one hour of labor per unit. Before return to service, the owner/operator must receive the applicable GTX 33X/3X5 ADS-B AFMS Revision 6 and the STC SA01714WI maintenance manual/ICA Revision 8 if those documents have not already been provided. The current GTX 3X5 Series Pilot’s Guide Revision G also applies.

This bulletin is specifically for affected Part 23 installations under SA01714WI and states that implementation is through Garmin’s authorized dealer and service-center network. RWAS can verify the installation basis, determine applicability, load the approved software and complete the required documentation. Contact RWAS at (605) 299-8178.

For current pricing or installation scheduling, call RWAS at (605) 299-8178 or contact the service desk.