"Jeff Saylor" wrote in message
...
That's usually true. An exception is G. O. Carlson-Chester County
Airport,
Pennsylvania. It's had weather reporting for a while now and I've heard
of no
plans to change its identifer from 40N.


I remember reading online about airport identifiers a while back. Now,
if
only I can find it again...


I found the identifier information at
http://www.faa.gov/atpubs/LID/LIDHME.htm and
http://www.faa.gov/atpubs/LID/ch1.htm