Cannot switch to FMS1 nav source

[Chrjs86]

HI,

iI'm in the air and I have a problem with the nav source on the pilot side. Through the "NAV SRC" button on the pilot side i am only able to cycle between VOR1 and VOR2, I'm not able to select FMS1 even though I can see on the left MFD that FMS1 is working. Within the menu there is also not option to go to NAV/FMS1. Right now I switched to FMS2 on the right side and this seems to work, the plane follows the flight plan. Maybe I'm just stupid right now but how can I get back to FMS1 as my nav source on the left PFD?

Thanks for your help! Chris

[Chrjs86]

ok, back on the ground I shut the aircraft down, then applied power again and now the default nav source seems to be FMS1 again. I still dont know why it wasn't available last time...

[Black2306]

I had a similar situation, but I can’t switch nav source from fms1 to vor 1. this has happened to me twice in LSGG for ILS 22. Frequency for vor1 autotune and correct but not automatically switch from fms1 to vor1. I was only able to switch at 800 AGL. For me only in LSGG RWY22, for RWY04 correct. 

[Pils]

On 1/23/2022 at 2:45 PM, Chrjs86 said:

HI,

iI'm in the air and I have a problem with the nav source on the pilot side. Through the "NAV SRC" button on the pilot side i am only able to cycle between VOR1 and VOR2, I'm not able to select FMS1 even though I can see on the left MFD that FMS1 is working. Within the menu there is also not option to go to NAV/FMS1. Right now I switched to FMS2 on the right side and this seems to work, the plane follows the flight plan. Maybe I'm just stupid right now but how can I get back to FMS1 as my nav source on the left PFD?

Thanks for your help! Chris

You must change Preset Nav to the right option before using the Nav Src swap button.