<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by gcinet:
The last 4 times I have needed to clear secutity the Platinum AA card worked for me.</font>
The AS person montering the line probably didn't (or doesn't) know the AA status rankings.
I routinely enter via the C security line to fly UA in the North Terminal. I doubt anyone will have any trouble with that.