Now I am a little bit accustomed to Transall, but something strange happened. I finished all starting procedures and the props run fine. But when I want to activate flaps, they immediately go back to 0. I looked if there is something wrong with hydraulics but tbh I could not find it on OHP nor any other place in the cockpit. Or is it a bug that will disappear when is start all new?
UPDATE
Even using Auto Complete Item wont help. The flaps stay in position 0
This sounds like some sort of control conflict with a peripheral or an Assistance setting.
I just picked up the C-160 and flew it yesterday and had no issue with the flaps, as you described.
Me too and did not change my peripherals. That’s why I wonder, actually. But you are right, it has to be the Thottle Control (Honeycomb) somehow. But they are the same as yesterday, and checking Button 15 and 16 shows good reaction.
UPDATE
I deactivated Flap control via Honeycomb and it worked out fine. Is the Honeycomb damaged?
This is my configuration
It was probably a bug with Transall since I restarted it now and now the flaps work as intended. I like to know what happened for the next time.
I have seen, a number of times, where I will experience some oddity with an aircraft that a restart of the sim will fix.
I don’t know if it’s an issue with the aircraft, the sim, the controls or a combination that cause it.
Fortunately, it’s been a blip that is easily fixed with a restart.
Glad you got it sorted.
Sure, but it destroys immersion. I did start it with a full checklist, and it was nice until flaps did not work. I restart the sim and auto start it since I don’t have time to do all again manually. 
I had a simulair problem. I found that sometimes the flap emergency overide is in wrong postion. This causes me the problem of returning the flaps to zero.
