Tower Controller reported a taxiing aircraft entered the active runway without clearance. A departure on the same runway was instructed to cancel takeoff and took evasive action.
Synopsis
Tower Controller reported a taxiing aircraft entered the active runway without clearance. A departure on the same runway was instructed to cancel takeoff and took evasive action.
Narrative
A PA46 called ready to taxi at the west ramp. I told him 'Runway 17R at Echo; taxi via Echo'; and he read back; 'taxi to 17R at Echo.' I noticed him taxiing fast on the runway while giving another aircraft an IFR clearance. As he got closer to the runway; I asked him if he needed a runup; he replied no. I was about to ask him if he needed a back taxi when I noticed he wasn't slowing down for the hold short line. I immediately told him to stop; but he passed the hold short line. I turned to tell my Local Controller; but he had already seen it and canceled a Cessna's takeoff. The Malibu was not able to stop before entering the runway; and the Cessna was not able to stop before the intersection. The Cessna swerved left to miss the Malibu; and reported being 50 FT at the time he passed him. We advised the Malibu of his possible pilot deviation. I believe we did everything in an extremely timely manner. I don't know what made the pilot not see the runway; but as soon as I noticed he wasn't going to stop; I reacted.
Second reporter narrative
I cleared a C210 for takeoff from Runway 17R/C. When a PA46 was on the takeoff roll; I noticed the C210 crossing the hold short line at Runway 17R/E and taxiing onto the runway. I immediately instructed PA46 to stop.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.