Dave,
This scenery is causing issues in PF3,if you remember me e-mailing you with a few issues,one of which PF3 was freezing as soon as i was contacting clearance on 121.97.
I don't recall having any issues when i first installed it only recently and have now it's updated to v3.
I removed the IniBuilds EGLL folder from my community folder and all worked well...bizarre to say the least,i'll put it back in and try again,
Regards Dave