I might look into that a little later. I fixed all such problems for the official FGAddon hangar, but 3rd party hangars might still have issues (the more feedback, the better, as I can then fix things). Can I ask from which hangar this aircraft is from?
It is fixed with the latest FGDATA from the development repository. It might not work if the 2016.2.1 FGDATA did not get the commits where the models were readded.
It does not load all code correctly, so the thing has error, but when you actually load it in the sim, then is works fine. This has nothing to tod with FGMEMBERS.
Skillset: JSBsim Flight Dynamics, Systems, Canvas, Autoflight/Control, Instrumentation, Animations Aircraft: A320-family, MD-11, MD-80, Contribs in a few others