I want report a CTD on this Airport, no Mods, only this addon from Aerosoft on runway 14L suddenly got CTD.
So maybe another people have this addon and crash?
Do you have the rolling cache enabled in your MSFS settings ?, if yes try delete or disable it.
If does not fix your issue then report it to Aerosoft.
If you have microsoft airport installed (microsoft-eddk-cologne-bonn) remove it via content manager. With current game implementation both airports will be loaded at the same time.
Cheers