Narrative:

Flight abc was cleared position and hold runway 23 to wait for traffic down field to clear. With the takeoff clearance and initial thrust addition, the aircraft began to veer to the right. When full left rudder at 80 to 90 knots would not correct the aircraft travel back to the centerline, I called for and performed an abort. Just after clearing the runway at K2, the left brake temperature indicators were indicating 6 on the outboard and 7 on the inboard. During the taxi to the gate both indicators increased to 8 units, and after the engines were shut down continued to rise to 9 units. I received every indication that the nosewheel steering was centered on the initial takeoff roll, and am therefore concerned as to the reason for the plane to veer to the right, with what appears to be a left brake assembly problem as that would dictate a left turning tendency. Maintenance is replacing the left brake assembly for the high brake temperature, however at this time the reason for the controllability problem has not been resolved. The passenger were initially held on board for safety and until verification that the brake assembly would cool properly. Later the flight was cancelled.

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Original NASA ASRS Text

Title: A MEDIUM LARGE TRANSPORT ON TKOF ROLL BEGAN TO VEER TO THE R AT 90 KNOTS. TKOF WAS REJECTED. RPTR SUSPECTED BRAKE MALFUNCTION.

Narrative: FLT ABC WAS CLRED POSITION AND HOLD RWY 23 TO WAIT FOR TFC DOWN FIELD TO CLR. WITH THE TKOF CLRNC AND INITIAL THRUST ADDITION, THE ACFT BEGAN TO VEER TO THE R. WHEN FULL L RUDDER AT 80 TO 90 KNOTS WOULD NOT CORRECT THE ACFT TRAVEL BACK TO THE CTRLINE, I CALLED FOR AND PERFORMED AN ABORT. JUST AFTER CLRING THE RWY AT K2, THE L BRAKE TEMP INDICATORS WERE INDICATING 6 ON THE OUTBOARD AND 7 ON THE INBOARD. DURING THE TAXI TO THE GATE BOTH INDICATORS INCREASED TO 8 UNITS, AND AFTER THE ENGINES WERE SHUT DOWN CONTINUED TO RISE TO 9 UNITS. I RECEIVED EVERY INDICATION THAT THE NOSEWHEEL STEERING WAS CTRED ON THE INITIAL TKOF ROLL, AND AM THEREFORE CONCERNED AS TO THE REASON FOR THE PLANE TO VEER TO THE R, WITH WHAT APPEARS TO BE A L BRAKE ASSEMBLY PROB AS THAT WOULD DICTATE A L TURNING TENDENCY. MAINT IS REPLACING THE L BRAKE ASSEMBLY FOR THE HIGH BRAKE TEMP, HOWEVER AT THIS TIME THE REASON FOR THE CONTROLLABILITY PROB HAS NOT BEEN RESOLVED. THE PAX WERE INITIALLY HELD ON BOARD FOR SAFETY AND UNTIL VERIFICATION THAT THE BRAKE ASSEMBLY WOULD COOL PROPERLY. LATER THE FLT WAS CANCELLED.

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.