On Thu, 02 Apr 2009 11:10:38 -0800, VOR-DME wrote:

I agree with everything you say.
That's why I asked the question, because I am faced with several approach
plates which specify "Requires 50KHz Glideslope". I cannot find anything
about this in any documentation, so I have no idea what this note means.

I think what I'll do is fly a vor or loc approach at one of these and see if
the GS comes in on the KX155A. If so, I'll just guess that note is of no
importance, and relates to something very old and forgotten.


I have finally been able to find the chart to which I believe you are
referring (ILS/DME TNO RWY 25R) and I believe you have misquoted the
requirement, and mis-understood the meaning.

The chart that I am examining on line does NOT read "Requires 50KHz
Glideslope"

Rather, the box I see reads:

"GP usable only by ACFT equipped with ILS at 50 kHz"

ou, en française:

"GP utilisable uniquement par ACFT équipé ILS à 50 kHz"

This means that the spacing on the **ILS** receiver needs to be 50 kHz.
Makes sense since the LOC frequency is 110.15.

Your KX155A should have no problem tuning this approach, and channeling the
correct GP frequency, so long as your KX155A can tune 110.15 and has a GP
receiver.

Having read that, it seems to be a strange note because, if your ILS
receiver could not tune in 50 kHz increments, you wouldn't be able to use
the LOC or LLZ approach either! In the US, I would ask our local Flight
Standards District Office for clarification if I saw a note like that. But
I would not be concerned about flying it with a KX155.
Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)