"Gary Drescher" wrote in
:

"Judah" wrote in message
. ..

snip

Just a point of terminology--2000' is the minimum altitude there, but
it's not the MSA. The MSA there is 2900', and wouldn't be relevant.
(As is often the case, the FAA has violated a cardinal rule of clear
naming: when two names are similar, the difference between them should
reflect the difference in their meanings. The MSA differs from the
minimum altitude not with regard to being safe, but with regard to
applying when off-course.)


A valid point. The MSA for the northeastern region within 25 NM is
2900', though the published minimum allowable (and presumably safe)
altitude while flying the ILS inside Faran is 2000'. Is there a name for
that published altitude?


snip

Maybe he was tracking a harmonic?

Is it possible to pick up a false GS a few hundred feet *below* the
proper altitude?

According to the document published at

http://afsafety.af.mil/magazine/htdo...8/dontneed.htm

if a heavy was holding inside the ILS Hold Short Line it could generate
interference that could cause the glideslope to fail high or low...

Not really a harmonic, I guess, but apparently a possibility.