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Aviation Alerts and Advisories

GI 275 Multi-Function Instrument Software Version v2.42 Update


GI 275 Multi-function Instrument systems installed under the GI 275 Part 23 AML STC SA02658SE are affected.


STC SA02658SE MDL Revision 14


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


This STC Service Bulletin provides notification of STC SA02658SE Master Drawing List revision 14 update.

This update includes GI 275 Multi-function Instrument Software Version 2.42 and GEA 110 Software Version 2.21.

    • Approved interface with the UMA T1EU70D Differential Fuel Pressure sensor.
    • Updated GEA 110 sensor configurations for the propeller RPM magneto P-Lead interface.
    • Updated the GI 275 EIS user interface with minor improvements.

GEA 110 software version 2.21 includes updated magneto P-Lead filtering to improve propeller RPM stability.

GI 275 v2.42 and GEA 110 v2.21 software must be updated together.

The version 2 (v2) RPM sensor must be configured following the software update if the aircraft has a GEA 110 installed and interfaced to magneto P-Leads for RPM indication.

ASDN Service Bulletin 21105 Rev A