Tower controller reported a taxiing aircraft entered the active runway without clearance. A departur...

Attributes
ACN	914512
Time
Date	201010
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	PA-46 Malibu Meridian
Flight Phase	Taxi
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna 210 Centurion / Turbo Centurion 210C 210D
Flight Phase	Takeoff
Flight Plan	VFR
Person 1
Function	Flight Data / Clearance Delivery Ground
Qualification	Air Traffic Control Fully Certified
Person 2
Function	Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	Conflict Ground Conflict Critical Deviation - Procedural Clearance Ground Incursion Runway
Miss Distance	Horizontal 50

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.

Original NASA ASRS Text

Title: 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.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

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.