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VFR approach altitude

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schroewo
Post subject: VFR approach altitude
Posted: Sat Mar 20, 2010 2:11 pm
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Location: Germany
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Hi,

during my last VFR flight from LSGL (elev. 2041') to LSPM (elev. 3238'), flight level was 5500', I get the instruction to descent to 2000'. That's a little bit too low to make a safe landing. Maybe it will be possible to change the calculation of the approach altitude so it will be at least e.g. 1500' above the elevation of the destination airport.

Kind regards
Wolfgang
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Dave March
Post subject: Re: VFR approach altitude
Posted: Sat Mar 20, 2010 3:38 pm
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Location: Sawtry, Cambridgeshire. UK
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Have you tried adding a minimum FAF altitude for that airport on the SID/STAR page?

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Cheers

Dave March

Email: dmarch@oncourse-software.co.uk

I don't know if my memory is getting worse as I get older...
...I just can't remember how it used to be!

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schroewo
Post subject: Re: VFR approach altitude
Posted: Sat Mar 20, 2010 6:55 pm
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Posts: 38
Joined: Sun May 31, 2009 8:53 pm
Location: Germany
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I've nothing entered in the SID/STAR page. Thought it's not important because it was a VFR flight. But I found the following lines in the debug_monitor.log file:
Code: Select all
 PF FAF Alt set to 2030

                           ------------------
                           Flight Plan Detail
                           ------------------
                           
20.03.2010 13:19:39: 390 - Last waypoint altitude adjusted from 2262 to 2030'
                           LSGL   -   2041
                           SIO    -   5500
                           LSPM   -   2030
                           LSPM   -   3238
                           
                           Cruise Altitude set at 5500
So you were right, the reason was the FAF altitude. Maybe you can check the logic of the calculation of the FAF altitude. It should never be lower than the elevation of the destination airport.

Kind regards
Wolfgang
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Dave March
Post subject: Re: VFR approach altitude
Posted: Sat Mar 20, 2010 9:59 pm
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Posts: 6122
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Location: Sawtry, Cambridgeshire. UK
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The PF FAF Alt is not something I calculate... it's passed over from ProFlight, so I will have to intercept and check it. In the meantime you can set the minimum altitude for that airport on the SID/STAR page and see if that helps... it certainly should ;-)

_________________

Cheers

Dave March

Email: dmarch@oncourse-software.co.uk

I don't know if my memory is getting worse as I get older...
...I just can't remember how it used to be!

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schroewo
Post subject: Re: VFR approach altitude
Posted: Sun Mar 21, 2010 3:52 pm
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Posts: 38
Joined: Sun May 31, 2009 8:53 pm
Location: Germany
Contact: Website
 
Thanks, setting the minimum altitude works. But it would be nice if PFE can correct such apparently wrong altitudes.

Kind regards
Wolfgang
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