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Forum: Tech Log

24th Sep 2017, 13:40

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

You don't descent below 5,000 until passing D16.5...

You don't descent below 5,000 until passing D16.5 GMM (or 17.4 AGP) then either descend to 4,200 to intercept the GS or stay at 5,000 to intercept the GS. You have this option because there are no...

Forum: Tech Log

21st Sep 2017, 15:45

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

Perhaps so at major terminals, but terrain is a...

Perhaps so at major terminals, but terrain is a big factor in some cases. Attached is a good example. They offer a second procedure that uses the GS out beyond the normal maximum distance for an...

Forum: Tech Log

21st Sep 2017, 14:25

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

Some GA aircraft certainly do have that...

Some GA aircraft certainly do have that capability, but many still do not.

Although it is a regulatory violation for an air carrier airplane to descend below Class B, that doesn't get the...

Forum: Tech Log

21st Sep 2017, 13:28

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

I believe they are frequency protected to a...

I believe they are frequency protected to a greater distance than customary. This was done in the days before LNAV was common so the localizer could be used out to 50 miles (but not the GS).
...

Forum: Tech Log

20th Sep 2017, 20:18

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

The issue at LAX and other high-traffic locations...

The issue at LAX and other high-traffic locations was loss of vertical separation on a hot day, not terrain.

Forum: Tech Log

20th Sep 2017, 14:08

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

You can intercept the GS anytime after passing...

You can intercept the GS anytime after passing HUNDA, but not later than LIMMA.

Forum: Tech Log

20th Sep 2017, 13:05

Replies: 52

Descent profile when cleared for an ILS approach?

Views: 25,651

Posted By aterpster

Whatever it takes. The step-down fixes are the...

Whatever it takes. The step-down fixes are the regulatory minimum altitudes until LIMMA. Most carriers use Baro VNAV until passing HUNDA, which provides for a uniform descent while complying with...

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