EFIS / Nav disagree in approach mode

[Jetman67 517]

Hi AllI am getting an EFIS / Nav disagree message in approach mode on the efis when tuned into a valid ILS frequency on all ILS approaches, the approach is working and I can see it active on the EFIS in approach mode but still getting the writing across the efis screen as soon as I tune in the ILS, this happens on all models of the 737, anybody know why this is happening, this error is mentioned briefly in the 737 PMDG AOM but does not indicate why, thanksWayne

[pschlute 37]

Hi AllI am getting an EFIS / Nav disagree message in approach mode on the efis when tuned into a valid ILS frequency on all ILS approaches, the approach is working and I can see it active on the EFIS in approach mode but still getting the writing across the efis screen as soon as I tune in the ILS, this happens on all models of the 737, anybody know why this is happening, this error is mentioned briefly in the 737 PMDG AOM but does not indicate why, thanksWayne

It is telling you that you have an ILS tuned on Nav1 radio, but have not set ILS mode on the EFIS display (ie still in map mode)

[JET 1 0]

It is telling you that you have an ILS tuned on Nav1 radio, but have not set ILS mode on the EFIS display (ie still in map mode)

The ND does not need to be in ILS mode to fly the approach and is should not trigger that warning. It's more likely the ils frequency/course in the FMC database is different from the working one in the simulator, even though the displays confirm the ils works just fine. You just need to ignore it.Sometimes there are mismatches when add-on scenery is installed etc.. EFRO ils rwy 21 is one example.

[Jetman67 517]

It is telling you that you have an ILS tuned on Nav1 radio, but have not set ILS mode on the EFIS display (ie still in map mode)

thanks for the reply, I am definently not in map mod I am in approach modeWayne

[ilovetofly 1]

EDIT. Wrote something but I wasn't sure since I haven't flown the 737 for a while. So I erased it.Jim Dow

[falcon999 24]

thanks for the reply, I am definently not in map mod I am in approach modeWayne

You need to set the course in the MCP to match the course in the FMC Approach Reference page.

[Jetman67 517]

You need to set the course in the MCP to match the course in the FMC Approach Reference page.

thanks very muchWayne

[ilovetofly 1]

You need to set the course in the MCP to match the course in the FMC Approach Reference page.

Exactly what I had written, but wasn't 1000% sure. Glad to see I wasn't off base.Jim Dow