I mean, the original poster even seems to be referencing the A/FD
specifically (though he wrote "AD", I agree with Jose that it's a good guess
he really meant A/FD). How did this question even come up, when the correct
information is right there?

Maybe the AF/D is not correct. I've come across errors in it before;
reality trumps theory.

One of the more irksome errors is the TPA - if it is not listed in the
AF/D, it's supposed to be "standard". Well, standards have changed, but
practices haven't, so (for example) GBR (Great Barrington) had the TPA
unlisted, I assumed 1000 feet, but the locals use the old standard of
800 feet. Another aircraft right where I was got my attention real
fast, but I couldn't find her.

The AF/D gets its info from the airport manager, who may not even know
to supply it (after all, it's standard - it's been 800 feet since he was
a little boy).

I'm certain that there are airports where the locals call it one thing,
but the Feds call it something else.

Jose
--
The monkey turns the crank and thinks he's making the music.
for Email, make the obvious change in the address.