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PostPosted: Tue Nov 07, 2017 3:01 pm 
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Joined: Fri Mar 04, 2016 4:14 pm
Posts: 62
Location: near EHAM
My flight today EGLL to LFPO had some PF3 issues.

14 Nm in the STAR the altitude fix is 13000. So I've set that altitude at the beginning of the STAR. When the VNAV of my Q400 indicates that it is time to descend for a point that is 14 Nm further, I still have not heard from ATC, so I asked L9 (because L12, what it should have been is no option).
At the STAR beginning I get RWY02 which is correct. Wind is 010@6. Is was that and it stayed that according to my AS16. But I get a RWY change for RWY20 and after that again back to 02 and, guess what.... again back to 20. So I had to ask for 02 and finally got it.

I think that this has something to do with where PF3 gets the weather. Not from the METAR for sure, because that stayed the same all the time during arrival and approach. And.... in the real world there really must be a significent wind change for ATC to direct aircraft that are in a STAR already, to another RWY. Even when the STAR is as long as it is at LFPO.

It might be, that PF3 uses the weather from the sim because not everybody is on 'real world weather'. Well.... then it might be a good idea to have a switch in PF3 that implicates 'real world weather from the METAR' instead of from the sim.

Cheers

Dirk


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PostPosted: Tue Nov 07, 2017 4:07 pm 
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Joined: Sun May 05, 2013 2:22 am
Posts: 366
Quote:
7-11-2017 14:00:38: 380 - Extracting Weather Data from LFPO
7-11-2017 14:00:38: 890 - Visibility from weather station: 44
7-11-2017 14:00:38: 890 - Wind DIR from weather station : 10
7-11-2017 14:00:38: 900 - Active Runway is set to 2

7-11-2017 14:02:48: 340 - Extracting Weather Data from LFPO
7-11-2017 14:02:48: 860 - No ATIS Weather data detected for LFPO --> now retrying...
7-11-2017 14:02:50: 920 - Visibility from weather station: 53
7-11-2017 14:02:50: 920 - Wind DIR from weather station : 196
7-11-2017 14:02:50: 930 - Active Runway is set to 20

7-11-2017 14:03:49: 240 - Extracting Weather Data from LFPO
7-11-2017 14:03:49: 760 - Visibility from weather station: 44
7-11-2017 14:03:49: 760 - Wind DIR from weather station : 10
7-11-2017 14:03:49: 760 - Active Runway is set to 2

7-11-2017 14:04:51: 620 - Extracting Weather Data from LFPO
7-11-2017 14:04:52: 130 - No ATIS Weather data detected for LFPO --> now retrying...
7-11-2017 14:04:54: 190 - Visibility from weather station: 58
7-11-2017 14:04:54: 190 - Wind DIR from weather station : 181
7-11-2017 14:04:54: 190 - Active Runway is set to 20
The runway changes were due to rapid and frequent wind shifts at your destination airport. Other users experiencing this have been able to adjust settings in their weather add-on (e.g., wind-lock) to reduce the frequent wind shifts. See the following for more info:

viewtopic.php?f=8&t=2215#p12800

viewtopic.php?f=8&t=2280#p13240

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PostPosted: Tue Nov 07, 2017 4:53 pm 
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Joined: Sun May 05, 2013 2:22 am
Posts: 366
Regarding the descent, I took a fast look at the flight plan and it looks like you adjusted the altitude for your last waypoint to 13000 but did not adjust the other altitudes, so at LGL (18 miles before your last waypoint) you are still at FL250. I would recommend adjusting LGL to an altitude of no more than 19000.

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PostPosted: Tue Nov 07, 2017 8:01 pm 
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Joined: Wed May 27, 2009 8:41 pm
Posts: 950
Location: LIMZ
Quote:
Regarding the descent, I took a fast look at the flight plan and it looks like you adjusted the altitude for your last waypoint to 13000 but did not adjust the other altitudes, so at LGL (18 miles before your last waypoint) you are still at FL250. I would recommend adjusting LGL to an altitude of no more than 19000.
Yes, the approach was much too high. And for the STAR there will be altitude constraints. So those wypts with altitude constraints also need to be added to the fpl. Also your cruise altitude was too high for such a short flight. It needs to be no more than FL230 at the most. As you need to start your descent just after crossing the French coast.

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