Hello Dexter,
Thanks for the explanation regarding the file in question.
I own Orbx SAK and Valdez Airport PAVD (payware) on the region (I do not have Orbx Vector or Open LC NA) as well as RTMM freewares sceneries for PAVD (BWEP and Medical Dispatches / Facilities).
The setting of the mesh in my "old" P3D v2.4 is at 5m as always for Orbx landscapes.
As my screens show in my post on the Orbx forum, the worry is not on the airport itself but on the left side of the city, in front of the airport.
Have a good day.