AMJBecker 0 Posted February 17, 2019 Share Posted February 17, 2019 I'm flying version 1.2.3 of the Airbus A320 Family Professional and just training myself for flying HOLD patterns. When I try to IMM EXIT a HOLD, I would have expected that the A/C flies the shortest way towards the HOLD FIX an then procede with the flight plan. That's how it is described as well in the Thales Flight Management Pilot Guide from Dec 2004 (quite old but it's the one I have). But the A/C actually flies an extra circle before turning towards the HOLD FIX. See the following screenshots. Original Flight Plan (NOLG3A STAR to EDDH ILS 23) Please login to display this image. After inserting HAM and defining HAM as HOLD FIX (computed HOLD) Please login to display this image. HOLD is shown on ND as expected Please login to display this image. A/C enters HOLD (direct entry as expected, no surprise, because it's a computed HOLD) and MCDU shows IMM EXIT prompt Please login to display this image. IMM EXIT prompt posted Please login to display this image. ND shows extra circle, A/C flies extra circle. This is the issue I'd like to raise. Is this a normal behaviour? I would have expected a behaviour that is described in the Thales document. Please login to display this image. What is also remarkable: the recalculated path towards the glidepath became too narrow. But this can be corrected by defining a fly-over at DH658. Following ND Screenshot shows path from HOLD FIX HAM to the glidepath after setting fly-over at DH658 Please login to display this image. Please login to display this image. Please login to display this image. Please login to display this image. Please login to display this image. Link to comment Share on other sites More sharing options...
DaveCT2003 2553 Posted February 17, 2019 Share Posted February 17, 2019 Just to be sure before we go looking for a bug... are you familiar with the three basic Hold Entry Patterns? If not, then there is a vast amount of information on the web (Google "Hold Entry Patterns"). A very good one is HERE. Best wishes! Link to comment Share on other sites More sharing options...
AMJBecker 0 Posted February 17, 2019 Author Share Posted February 17, 2019 If you mean the direct, parallel and teardrop entry? Yes, I'm familiar with that stuff. The issue I have is not about the entry. I have a direct entry, because it is a computed HOLD. My issue is about the extra full circle in case of an immediate exit. I pushed the prompt, when I already was on a straight line to the HOLD FIX. Circling is not necessary, as would be, if I were on the other side of the HOLD loop. Link to comment Share on other sites More sharing options...
AMJBecker 0 Posted February 17, 2019 Author Share Posted February 17, 2019 By the way, ignore the last 4 screenshots (those without text). I made them, but they aren't relevant for what I want to raise. Link to comment Share on other sites More sharing options...
AMJBecker 0 Posted February 17, 2019 Author Share Posted February 17, 2019 This is an extract of the Thales document, I was referring to. It's from part III, chapter 3.4, HOLD Function Please login to display this image. Link to comment Share on other sites More sharing options...
DaveCT2003 2553 Posted February 17, 2019 Share Posted February 17, 2019 Okay, now I understand what you meant! I'm sure you're right about the Hold Function in the Airbus Pro, but I have a flight a little later and I'll give it a check and pass this info along. We've been so busy with the Managed Speed and Descent issues that I honestly haven't done a Hold is quite a long time, so it should be looked at. Many thanks!!! Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted February 17, 2019 Aerosoft Share Posted February 17, 2019 It sounds indeed as an issue that needs to be looked at. Link to comment Share on other sites More sharing options...
DaveCT2003 2553 Posted February 18, 2019 Share Posted February 18, 2019 Okay, I found at least 3 problems with the HOLD function... not including the exit issue, so we'll have to take a deep look at the HOLD function. Thanks for letting us know! Best wishes! Link to comment Share on other sites More sharing options...
Aerosoft Aerosoft Team [Inactive Account] 51558 Posted March 6, 2019 Aerosoft Share Posted March 6, 2019 And we are indeed looking at holdings. Link to comment Share on other sites More sharing options...
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