Ok, can see the issue. It seams to be a issue with the complex plattform build up the mesh below the airport. Looks like P3D V5 could not handle it as V4 before.   Please make a backup of the file GCHI_OBJ-Plattform.BGL you find in the ..\Sim-wings Canary Islands Professional V5\El Hierro\Scenery folder and replace it with the file in the attached zip. Then check the frames again and give me short feedback it the frames are normal.