ILS Failure

[Guest cdavenport4]

It seems that whenever I use the A/P to fly an ILS in the 737-700 the A/P always "loses" the ILS, for lack of a better word, and reverts to VOR/LOC mode (i.e. localizer is tracked but glideslope is not). Am I doing something wrong or is there a fix for this?Thanks in advanceCharles Davenport

[crvm 0]

Well to answer your question, the ILS capture works so there is something else going on. They only sure way to know is for you to provide a detailed post so we can narrow it down. Sometimes a simple screenshot at the moment it occures can clear up what is going wrong.[h4]Randy J. Smith[/h4]

[Guest neeraj.pendse]

Yep, agree with Randy on that. Need more info! But a couple of quick comments:1. If you have the 800/900 upgrade it is best to have BOTH NAV receivers tuned to ILS.2. You trying to capture glideslope from BELOW, right?3. Ensure you are not at an airport with a LOC only approach.4. Ensure you are at the right speeds.- Neeraj.

[Guest cdavenport4]

I tried it once with the ILS freq in both nav recievers and it worked without any problem. I assume the fact that you have to have the freq in both radios is an issue with the software itself, yes?

[Guest pierre974]

Hi, That's a strange problem, because I often use the ILS on nav 1 and the VOR frequency on nav 2 (two different frequencies), and the glide path always works very well (I only have the indication that the configuration is on single channel). Actually, I use the two same frequencies (ILS on nav 1 and 2) when I want the aircraft to perform a complete autoland (low visibility).

[falcon999 24]

FYI: Both Nav radios do not need to be tuned to the ILS frequency for a CAT I ILS approach. Both Nav recievers are required to be tuned for an ILS CAT II/III approach (for autoland).