The 15 threshold end of the runway is ungrooved concrete which has the potential to be slippery when wet. The position of the aircraft from the photos looks like it may have gone into the grass during the turn onto the A taxiway. Perhaps they took the turn too fast and slipped off the side? I suspect the flaps/slats were retracted during the after landing checks as they turned off the runway and would fit with this theory.
This senario happened at the other end a few years ago with a well established UK operator when the 33 threshold area was also concrete. That end of the runway has since been covered in asphalt.
A look at google earth clearly shows the concrete areas (dont bother with apple maps, the image is very old!)
Last edited by FlyboyUK; 22nd Sep 2012 at 09:26.