Questions on Appchs. into EGE

[freightdoggie]

Hi all, just had a few quesitons about the approaches into EGE.

the approaches all have a - something, such as loc/dme-c, loc-b and rnav(gps) - d

Now I know if an approach is a -A then it means circling minimums only are published whether its for not being aligned within 30 degrees, or too steep of a descent for a normal landing,
my question is what is the variation of the letter in this?? I thought if the letter was, b or c, or d, then that is the second or third approach off of that particular nav aid, this would make sense for the loc - b, and loc/dme-c, where is the loc -a?? and why is there a rnav d, what predicates having a - letter after an rnav approach.
Thanks

 

[efiscompmon]

The letter indicates a susbstantial (sorry, my TERPS is packed can't say what it is) modification to the procedure.

A-B-C-D is the cycle used, returning to A. Fortunately, most approaches are static enough that all you usually see is a xxx-A.

 

[freightdoggie]

Thanks much!

 

[mike1mc]

Good question. What about the -Y and -Z approaches at some places?


I guess that answers why the VOR/DME OR GPS approaches at LGA start at -E and go through -H. Anyone have a copy of the TERPS. I know there was a guy who had a website with all that good stuff, but it seems to have been taken down.

 

[mmmdonut]

Ok... I am really stretching to answer this one, but I just read something in the AIM about it. For precision approaches where there are several versions of the approach for the same runway, they will be adding a letter to the end of it. Starting with Z and working BACKWARDS (Z, Y, X, W.... etc..) For example there might be two localizer approaches to a runway with slightly different configs. One would be LOC-Z the other LOC-Y - They did this at DFW for the new terminal construction. Check the AIM. I don't know enough about it to speak with any certainty.

Does anyone know what I'm talking about?

Good question. What about the -Y and -Z approaches at some places?


I guess that answers why the VOR/DME OR GPS approaches at LGA start at -E and go through -H. Anyone have a copy of the TERPS. I know there was a guy who had a website with all that good stuff, but it seems to have been taken down.

 

[groundpointsix]

Ok... I am really stretching to answer this one, but I just read something in the AIM about it. For precision approaches where there are several versions of the approach for the same runway, they will be adding a letter to the end of it. Starting with Z and working BACKWARDS (Z, Y, X, W.... etc..) For example there might be two localizer approaches to a runway with slightly different configs. One would be LOC-Z the other LOC-Y - They did this at DFW for the new terminal construction. Check the AIM. I don't know enough about it to speak with any certainty.

Does anyone know what I'm talking about?

Close. It doesn't just apply to precision approaches but rather to any instrument approach. See AIM 5-4-5.