The NTSB is investigating a runway incursion that occurred last Friday morning at Charlotte (N.C.) Douglas International Airport involving a PC-12 turboprop single and CRJ200 regional jet. At about 10:17 a.m. that day, the PSA Airlines CRJ200–operated as US Airways Express Flight 2390–was cleared for takeoff on Runway 18L. After the regional jet was into its takeoff roll, controllers cleared Pilatus PC-12 N409DR, which is owned by Collett Transportation and was being operated under Part 135, to taxi into position and hold farther down the same runway in preparation for a departure roll from the Taxiway A intersection. When the airport’s ground-based collision warning system alerted them of the runway incursion, controllers cancelled the takeoff clearance for the regional jet. The pilot of the PC-12, seeing the regional jet coming his way, taxied the turboprop to the side of the runway. The FAA reported that the regional jet stopped approximately 10 feet from the PC-12. The weather was VMC with nine miles visibility. There were no reported injuries to any of the 42 passengers or three crew aboard the jet or to any of those on the PC-12.