A320 flight crew aborts takeoff when uncommanded drift to left occurs at approximately 80 KTS.

Attributes
ACN	699794
Time
Date	200606
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : den.airport
State Reference	CO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	A320
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
Experience	flight time last 90 days : 220 flight time total : 9800 flight time type : 2876
ASRS Report	699794
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 775 flight time total : 3950 flight time type : 7560
ASRS Report	699796
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

During takeoff roll runway 25 den before or near 80 KTS I felt a swerve off centerline to left. I initially corrected with right rudder inputs to return to center after requiring increased rudder inputs without the normal response. This delayed response back to centerline caused me to abort the take off. The rejected takeoff was uneventful and we got back to centerline with rejected takeoff maximum braking engaged. We cleared the runway at B7 taxiway and stopped on taxiway bravo to have fire department inspect brakes. Left brakes rose to 600 degree and right side got as high as 700 degree. Brakes cooled after 20 minutes to 450 degree and we continued taxi back to the gate. Operations and maintenance were notified accordingly. Supplemental information from acn 699796: the fire trucks remained there till brakes cooled to approximately 450 degrees. Completed abort checklist and reviewed brake limits in flight manual. Taxied aircraft back to gate.

Original NASA ASRS Text

Title: A320 FLT CREW ABORTS TKOF WHEN UNCOMMANDED DRIFT TO L OCCURS AT APPROX 80 KTS.

Narrative: DURING TAKEOFF ROLL RWY 25 DEN BEFORE OR NEAR 80 KTS I FELT A SWERVE OFF CENTERLINE TO LEFT. I INITIALLY CORRECTED WITH R RUDDER INPUTS TO RETURN TO CENTER AFTER REQUIRING INCREASED RUDDER INPUTS WITHOUT THE NORMAL RESPONSE. THIS DELAYED RESPONSE BACK TO CENTERLINE CAUSED ME TO ABORT THE TAKE OFF. THE RTO WAS UNEVENTFUL AND WE GOT BACK TO CENTERLINE WITH RTO MAX BRAKING ENGAGED. WE CLEARED THE RWY AT B7 TAXIWAY AND STOPPED ON TAXIWAY BRAVO TO HAVE FIRE DEPARTMENT INSPECT BRAKES. LEFT BRAKES ROSE TO 600 DEG AND RIGHT SIDE GOT AS HIGH AS 700 DEG. BRAKES COOLED AFTER 20 MINUTES TO 450 DEG AND WE CONTINUED TAXI BACK TO THE GATE. OPS AND MAINTENANCE WERE NOTIFIED ACCORDINGLY. SUPPLEMENTAL INFO FROM ACN 699796: THE FIRE TRUCKS REMAINED THERE TILL BRAKES COOLED TO APPROX 450 DEGS. COMPLETED ABORT CHKLIST AND REVIEWED BRAKE LIMITS IN FLT MANUAL. TAXIED ACFT BACK TO GATE.

Data retrieved from NASA's ASRS site as of January 2009 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.