Hello,This problem suddenly occured to me. The picture explains it all: There is no heading arc in the HSI arc mode, the FULL mode indicates heading normally. Any ideas what has happened? Restarting didnt help, and the system is fully aligned.

The HDG is flagged yellow, FCS set to co pilot and no AFCS indications on the EHSI, also there's no nav selected that I can tell. Are you using the checklist or AOM?

Hello Dan,I'm using the checklist provided with the PDFs. The FCS is set to co pilot because I'm flying from the co pilots seat. No NAV is tuned in, but this doesnt make any difference, the heading arc still wont show up. Everything else seems to work normally.

The AHRS takes 3 min to align and the plane shouldn't be moved during this period. What if you select the FO FCS? You can still fly copilot side. I couldn't find anything in the AOM that defines the amber HDG indication but it should definitely be green.