Unexpected parallel entry into hold

Today I did my first hold in actual with the IFD.  Actually it was a reversal turn into the RNAV 6 into KBUY.  I was on a vector of roughly 250deg over the airport for KAKLE.  Looking at the chart and having the IFD tell me it was going to do a parallel entry, I expected a pass over KAKLE and a left turn to 240deg for a minute or two, then a return to KAKLE and initiation of the inbound course.

Yes it does.  I have an experimental setup with the IFD feeding steering commands through a GRT EFIS to a TruTrak AP with full GPSS steering (if that’s the right term).

Okay, please expand on that a bit.

BillinDurham wrote: Yes it does.  I have an experimental setup with the IFD feeding steering commands through a GRT EFIS to a TruTrak AP with full GPSS steering (if that’s the right term). The approach was activated automatically before the IAF on the IFD as expected and because it was a PT required entry, the hold was part of the approach.  I ‘armed’ the approach on my EFIS after activation and ‘executed’ it before the IAF.  The entire approach was flown with the AP with the right turn into a parallel entry being the only unexpected behavior My EFIS does not graphically show the hold or entry track and I the small display of the 440 made it difficult to notice the track of the entry.

BillinDurham wrote: I can’t without prior intent.  The logs are stored on a USB stick which has to be plugged in and logging turned on (as far as I know).  This is regarding a GRT HX and HXr system. In future flights I’ll try to start logging every flight until all questions re the IFD upgrade are answered.

BillinDurham wrote: Okay, since this particular approach is very close to home (I was using it to get underneath the ceiling and VFR into my Airpark strip), I’m going wait to go out in VFR conditions and re-fly the same approach with logging and such.  Then I think you’ll best be able to advise me on this. Given what you’ve told me so far, it does sound like the AP was commanded to simply turn back to the KAKLE and took the shortest route which would have been a right turn.  The hilpt was simply not commanded.  It worked because I was at 4,000 already and there was no other traffic or obstructions present but it wasn’t the right thing to do. Thanks!