ALT 00640 is ICARUS data, I bet you actually have the GTN serial port wired to the EFIS transponder serial port that is sending ICARUS data or you have it wired to the Transponder.
ALT 00640 is ICARUS data, I bet you actually have the GTN serial port wired to the EFIS transponder serial port that is sending ICARUS data or you have it wired to the Transponder.
Rob Hickman
Advanced Flight Systems Inc.
Have emailed several screen shots of my config to you.