Tower controllers described an amass directed abort when a taxiing aircraft entered the runway witho...

Narrative:

I was working local 1 and 2 (runway 3/28R). I taxied dash 8 into position on runway 28R with traffic; a CRJ9; on 3 mile final. Advised him to be ready for immediate departure and traffic on final. I scanned runway and cleared the dash 8 for an immediate takeoff. As the dash 8 was passing A2 intersection the amass advised runway 28R occupied. I observed a trinidad on runway 28R at intersection A6 on center line. I calculated the the dash 8's speed and position and decided to abort his takeoff. I informed him of the traffic on runway and he came to a stop just past A4 then I sent the CRJ9 around. The trinidad was confused and would not take directions from ground and remained on runway center line still taxiing opposite direction toward the dash 8 before he realized he had to exit or hit him. He stopped just in front of the dash 8 at A5 and finally cleared the runway. I had the dash 8 exit at A6 and go back to ground. He returned to gate and they removed the wheel's and had to replace brakes and grounded the plane.

Original NASA ASRS Text

Title: Tower Controllers described an AMASS directed abort when a taxiing aircraft entered the runway without authorization. Flight crew also reported their aborted takeoff incident.

Narrative: I was working Local 1 and 2 (Runway 3/28R). I taxied Dash 8 into position on Runway 28R with traffic; a CRJ9; on 3 mile final. Advised him to be ready for immediate departure and traffic on final. I scanned Runway and cleared the Dash 8 for an immediate takeoff. As the Dash 8 was passing A2 Intersection the AMASS advised Runway 28R occupied. I observed a Trinidad on Runway 28R at Intersection A6 on center line. I calculated the the Dash 8's Speed and position and decided to abort his takeoff. I informed him of the traffic on runway and he came to a stop just past A4 then I sent the CRJ9 around. The Trinidad was confused and would not take directions from Ground and remained on runway center line still taxiing opposite direction toward the Dash 8 before he realized he had to exit or hit him. He stopped just in front of the Dash 8 at A5 and finally cleared the Runway. I had the Dash 8 exit at A6 and go back to Ground. He returned to gate and they removed the wheel's and had to replace brakes and grounded the plane.

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.

Attributes
ACN	950352
Time
Date	201105
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Dash 8 Series Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Person 1
Function	Handoff / Assist
Qualification	Air Traffic Control Fully Certified
Person 2
Function	Handoff / Assist Local
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Critical Deviation - Procedural Clearance Ground Incursion Runway

Tower controllers described an amass directed abort when a taxiing aircraft entered the runway without authorization. Flight crew also reported their aborted takeoff incident.