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Tango777

Runway course hdg in FMC wrong

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Hmm... learned something. I didn't realize NGX looks at that file at all.

 

That file has been present in PMDG navdata for as long as I can remember, so I assumed all PMDG sims refer to it.

 

Am I the person that is being referred to as OP?

 

Yes, you made the opening post so that makes you the OP in this thread.


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That file has been present in PMDG navdata for as long as I can remember, so I assumed all PMDG sims refer to it.

 

I do not recall it predating the PMDG 77X, which is congruent with the observation that loading the 77X will rebuild the file but loading the NGX without it is a non-event. Still, Kyle says it matters so maybe changes have been made that I'm unaware of... which is not news LOL.

 

Regardless, I note the entry for KIND runway 32 is:

RW;32;39.720208;-86.270386;796;11050;320;320;7278

 

The course is apparently 320 whereas the ILS entry in the BGL has a course of 319.  I'll have to refly that segment to double check if the course reset from 320 to 319 and I simply missed it or it didn't change and the navdata file is in play here for the NGX.  I have a long flight in progress so it will be later.


Dan Downs KCRP

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I do not recall it predating the PMDG 77X, which is congruent with the observation that loading the 77X will rebuild the file but loading the NGX without it is a non-event. Still, Kyle says it matters so maybe changes have been made that I'm unaware of... which is not news LOL.

Maybe you are correct, I just thought I'd seen it around in the folder. Anyway I found this post from Ryan which explains its purpose, which is to speed up FMC data searches.

 

http://www.avsim.com/topic/425675-ctd-on-flight-load-pmdg-777/#entry2851235


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Okay. If or when it happens again I will take notes while it is happening and post here.

 

brandon garcia

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I found this post from Ryan which explains its purpose, which is to speed up FMC data searches.

 

I remembered that as soon as you mentioned it, but not before... early onset of senility. Yup, post is in 777 subforum related only to the 777.  I recall a discussion that they found a memory load savings by using the cache instead of directly loading airports.dat, which is the source of airport/runway/ILS data in navdata and is shared with other PMDG products.  ARPTS_RWY.dat did not exist when I spent several days decoding all the navdata file formats and created the data definitions for them (available in AVSIM forum) sometime before/during MD-11 development.


Dan Downs KCRP

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