Originally Posted by
ShyGuy
This was actually one of the factors cited in the AA 587 crash.
The one exception was the Delta DC9-10 (almost RJ type) in the traffic pattern with a DC10 also doing touch n goes in Texas, and they caught the wake below a 100 feet...

Shy,
Apples vs. oranges. We're talking about ILS approaches. AA 587 was a departure issue where the descending wake vortices ARE an issue. Your other example is low level where the vortices have no ability to descend.
Fly your ILS however you want, just be aware if you do it above the glideslope you're setting the guy behind you up for a "bumpy ride" at a minimum.
Enough said.