AP GPS mode cannot be activated/ HDG Mode does not work

[fillikirch]

Hi guys,

recently i did a flight from LESO to LXGB where i was not able to activate the gpss mode of the tbm. CDI was on gps and when i pushed the nav button gps was either armed (when i was not on the correct position for the current leg) or when i was on the lag and wanted to activate gpss the status bar in the pfd showed just an instant change back to rol mode. neither entering a direct nor activating the current lag enabled me to switch on gpss. when using the cdi nav mode flying vor radials the nav mode worked fine. HDG mode also does not work as it wont react to heading changes.

Edited September 24, 2019 by fillikirch

[Goran_M]

Did you turn on AP Trims?

[fillikirch]

as i said everthing else works.

[fillikirch]

after repairing everything in the maintenance section everything works again.

[Goran_M]

Excellent.  I did let Saso know about it.  But I'll tell him all is good.