Incorrect Heading/Alignment on Runway at Startup

[Guest mkhelms]

I planned to fly from Rwy 27 at KSAN to KPHX and my heading track on the ND shows 283, instead of 273. Wrong heading, the plane is aligned correctly on the runway. I correct heading on the FS9 map mode and the plane is incorrectly aligned. This occurs for all my PMDG aircraft(B737 NG all series and 747) at all airport runways. I corrected this problem once, but I don't recall the solution, would greatly appreciate the help, Mark

[Tabs 2,790]

Mark,I believe this might be a navdata issue maybe?

[downscc 1,327]

I recall a wrong heading showing up at all airports as someone had a scenery add-on that was causing it. If it were navdata, we all would be experiencing it. However, I'm sittin' in a SWA 737 on KSAN Rnw 27 and my heading is 273.A scenery add-on can mess with FS9 magvar.bgl in some way. But I don't remember which scenery.

[Guest mkhelms]

Dan, thank you for your response and solution, I unchecked the RAF Lyneham addon scenery that came with Just Flight's C-130 Hercules I recently installed in FS9, and the ND showed 273 for Rwy 27 at KSAN.All other runways at other airports showed the correct TRK, again thank you, Mark