TvB – my point is that if the flight controls are disturbed then a check is done with an outside observer watching the results. This is done if the sidestick was worked on as well as it is part of the flight controls. If the FCDC is swopped then the new unit is checked via the MCDU.
I am just surprised that there was no visual check requirement as there would have been in our airline. Was it not a requirement in LH?