First time noticing glideslope flag

[4RNB]

I am amazed at the number of things to debug owning a vintage airplane...

Flying an ILS during instrument training noted the flag was showing, it went away about 200 ft AGL. Friday going to try and troubleshoot whilst flying a lesson. What should I look for to say it works or does not? Any easy way to decide if it was that day, my radios, the actual gauge, or that ILS?

Thanks.

 

[Arob16]

What type of plane? Only have single Nav radio? Was the glide slope “working” with the flag showing ?

 

[somorris]

Check NOTAMs at the airport where you were flying the ILS. I have seen GS's NOTAMed out of service on more than one occasion. Also, somebody could have been running a mowing tractor in the GS critical area and interferred with the signal.

 

[4RNB]

Check NOTAMs at the airport where you were flying the ILS. I have seen GS's NOTAMed out of service on more than one occasion. Also, somebody could have been running a mowing tractor in the GS critical area and interferred with the signal.

There were no NOTAMs, don't think there were mowers, it was a school environment with many planes though.

 

[4RNB]

What type of plane? Only have single Nav radio? Was the glide slope “working” with the flag showing ?

Everything about the glideslope looked good except for the flag showing.
Dual nav radios but only one for GS.
C172

 

[4RNB]

Issue was not present today so I am going to consider case closed.