There's an height condition on the Baggage Loader, that won't be called if the door is higher than 3.0 meters from ground. However, is probably redundant now, since it's possible to specify the loader type in the GSX.CFG file.
- Edit the FSX\Simobject\Misc\FSDT_Baggage_Loader\SIM.CFG file with a text editor
- Look for the following line:
condition = %(exitAlt)f >= 1.2 and %(exitAlt)f <= 3.0 and %(ULDCode)r == ""
and change it to:
condition = %(exitAlt)f >= 1.2 and %(exitAlt)f <= 4.5 and %(ULDCode)r == ""
The animation support up to 5.0 meters, but it's unlikely you'll ever find an airplane using belt loaders with doors higher than the Concorde.