Hi Everyone, The upgrade of the year was removing vacuum system, removing mechanical AI/HSI, and adding two GI275's. GPSS works like a dream. Yay! I need help diagnosing error. GI 275 is showing TRK and not Heading during flight. I wanted to display the error area in the instruments. Please disregard the TRK FAIL portion on HSI (I was upgrading GTN 750 DB's at the time). I never see TRK FAIL during usage. My question is this...if you look carefully, you will see two yellow circle
