I have attempted to follow the instructions to add tanks to the FlyJSim 727-200Adv and ended up with this xml file. However, SAM tells me this plane does not have a valid ground service configuration. Do I need to add more services. I just have the doors and tanks. The documentation at https://stairportscenerieshelp.freshdesk.com/support/solutions/articles/77000515065--groundservice-aircraft-configuration-guide is pretty sparse.
I'm attaching the xml file which is in SAM/aircraft.
727-200Adv.zip