A canadair CL65 on takeoff roll. At 20 KTS the aircraft moved hard right from the runway centerline....

Attributes
ACN	597740
Time
Date	200310
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument pilot : multi engine
Experience	flight time last 90 days : 220 flight time total : 23000 flight time type : 800
ASRS Report	597740
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time type : 100
Events
Anomaly	aircraft equipment problem : critical other anomaly
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Consequence	other other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

As initial takeoff roll commenced (first officer's takeoff) all engine instruments appeared normal. At approximately 20 KTS, aircraft started to move hard right from runway centerline. First officer made comment as to aircraft tracking. Abort was called. I took over aircraft and noted it took hard full left rudder to keep aircraft on runway. Crosswind was 7 KTS. Exited runway. After landing checks completed, no unusual settings noted. Control check redone. It was everything normal. Second takeoff attempt started. At same point aircraft began hard right tracking taking full left rudder and my brake to control heading. Takeoff aborted. Returned to gate. Aircraft turned over to maintenance. On taxi back to gate, passenger told of aircraft tracking problem and would be returning to gate for maintenance. Reboarded all passenger later on another aircraft and they seemed happy to be going to ZZZ1. Additional: after first takeoff attempt, I observed no mechanical discrepancies, malfunctions or abnormalities regarding the aircraft controls, including steering. Therefore, I concluded maybe the first officer misapplied the controls/brakes during the first takeoff attempt. Callback conversation with reporter revealed the following information: the reporter stated the cause of the aircraft tracking problem is unknown, as maintenance did not advise the crew of the corrective action.

Original NASA ASRS Text

Title: A CANADAIR CL65 ON TKOF ROLL. AT 20 KTS THE ACFT MOVED HARD R FROM THE RWY CTRLINE. TKOF ABORTED. SECOND ATTEMPT AFTER CHKLISTS COMPLETED RESULTED IN HARD R TRACKING. TKOF ABORTED.

Narrative: AS INITIAL TKOF ROLL COMMENCED (FO'S TKOF) ALL ENG INSTS APPEARED NORMAL. AT APPROX 20 KTS, ACFT STARTED TO MOVE HARD R FROM RWY CTRLINE. FO MADE COMMENT AS TO ACFT TRACKING. ABORT WAS CALLED. I TOOK OVER ACFT AND NOTED IT TOOK HARD FULL L RUDDER TO KEEP ACFT ON RWY. XWIND WAS 7 KTS. EXITED RWY. AFTER LNDG CHKS COMPLETED, NO UNUSUAL SETTINGS NOTED. CTL CHK REDONE. IT WAS EVERYTHING NORMAL. SECOND TKOF ATTEMPT STARTED. AT SAME POINT ACFT BEGAN HARD R TRACKING TAKING FULL L RUDDER AND MY BRAKE TO CTL HDG. TKOF ABORTED. RETURNED TO GATE. ACFT TURNED OVER TO MAINT. ON TAXI BACK TO GATE, PAX TOLD OF ACFT TRACKING PROB AND WOULD BE RETURNING TO GATE FOR MAINT. REBOARDED ALL PAX LATER ON ANOTHER ACFT AND THEY SEEMED HAPPY TO BE GOING TO ZZZ1. ADDITIONAL: AFTER FIRST TKOF ATTEMPT, I OBSERVED NO MECHANICAL DISCREPANCIES, MALFUNCTIONS OR ABNORMALITIES REGARDING THE ACFT CTLS, INCLUDING STEERING. THEREFORE, I CONCLUDED MAYBE THE FO MISAPPLIED THE CTLS/BRAKES DURING THE FIRST TKOF ATTEMPT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE ACFT TRACKING PROB IS UNKNOWN, AS MAINT DID NOT ADVISE THE CREW OF THE CORRECTIVE ACTION.

Data retrieved from NASA's ASRS site as of July 2007 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.

A canadair CL65 on takeoff roll. At 20 KTS the aircraft moved hard right from the runway centerline. Takeoff aborted. Second attempt after checklists completed resulted in hard right tracking. Takeoff aborted.