Mike Adams wrote:

Roy Smith wrote:

Eventually the controller told me I could turn back inbound and
descend to 2900. I did so and found myself tracking inbound, but with
the CDI giving me indications opposite of what it should have been,
apparently the box thinking I was still trying to track outbound. I
could see (from the moving map) that I was south of the final approach
course, but the CDI was giving me "fly left" indication. At some
point, while we were puzzling over this, the CDI suddenly flipped to
"fly right"; I think this might have been as we passed CFGUY inbound.
Everything proceeded normally from that point.

Another option at this point would have been to select VTF (Vectors to
Final). When it became clear the box was still stuck on the outbound leg
or PT, this would have cleaned up the flight plan and made the inbound
leg to the FAF active. The CDI would then indicate normal deviation to
the inbound course also.

In retrospect, I think going into VTF mode would have made the most sense,
at least on this particular approach, where the PT-inbound course was the
same as the FAC. On an approach with a dog-leg, that wouldn't have worked.