Is it me or my unit

For the past two weeks when I try to fly the following....KHWV...CCC...KISP and select the ILS 24 approach my trainer never activates the VLOC outside the FAF. Yesterday I actually tried to fly that approach in my plane and the same thing occurred. When I flew the ILS 6 approach however everything was great. Would some please fly this short flight plan on your trainer and let me know if it works for you. I called tech support and they told me they would get back to me....but nothing as yet from them. Thanks

Edited by Froethel - 30 Sep 2017 at 3:48pm

Sure did.

mfb wrote: In the real airplane the IFD won't go into VLOC mode until five conditions are met for five seconds: 1) The next leg or the active leg terminates at the FAF 2) The aircraft is on the front side of the approach 3) The aircraft course is within 15 degrees of the final approach course 4) Cross track deviation is less than half a dot 5) The correct station is tuned and identified These are detailed on page 5-21 of the IFD-540 manual.

Some of these seem to conflict with information given on page 5-12 of the IFD-540 manual (

a+b probably combine to equal 5.
c matches 3.
d doesn't have an obvious corresponding item from page 5-21, but maybe is how it determines that it is on the "front side of the approach", item 2.
e specifies half scale deflection, 4 specifies half dot deflection.  There's a significant difference there.
f only refers to the active leg as a trigger, 1 refers to next or active legs as a trigger.

AviSimpson, could you shed some light on this?  Is this just an editorial thing (aka typo), or is there actually something different going on between what is described on these two pages?

Thanks Simpson!