B737-800 had excessive pull to the left during takeoff roll.

Attributes
ACN	496021
Time
Date	200012
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tnca.airport
State Reference	FO
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mcc.tracon
Operator	common carrier : air carrier
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 17000 flight time type : 1200
ASRS Report	496021
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : multi engine
Events
Anomaly	other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	flight crew : rejected takeoff
Consequence	other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

First officer takeoff. Rejected takeoff at approximately 90 KTS, due to unusual right rudder input (about 1/4) to keep aircraft on runway centerline. Both pilots started to notice rudder input at 40 KTS. Checked rudder trim indicator at zero. For troubleshooting moved rudder trim slightly left then right to zero, felt no change to problem. Aborted takeoff, called fire equipment to check aircraft. Tower reported small amount of brake smoke from left gear. They said it was safe and no smoke only warm brakes. Had senior mechanic verify finding of fireman. Towed aircraft to gate, and deplaned passenger after maintenance work and check of aircraft. Flight crew performed verification, by taxi out and high speed runway check. This was accomplished satisfactorily. Returned to gate for brake cooling and loaded passenger. Departed ava uneventfully. Callback conversation with reporter revealed the following information: after returning to the gate maintenance did an extensive aircraft inspection. The rudder system was checked. The trim system was checked. The rudder trim indicator operation was normal. The aircraft main gear was jacked and dragging brakes were checked. Strut service and extension was normal. Nothing abnormal was found. The crew then duplicated the takeoff on a test evaluation, and no problems were found. The trip then redeparted with no problems.

Original NASA ASRS Text

Title: B737-800 HAD EXCESSIVE PULL TO THE L DURING TKOF ROLL.

Narrative: FO TKOF. REJECTED TKOF AT APPROX 90 KTS, DUE TO UNUSUAL R RUDDER INPUT (ABOUT 1/4) TO KEEP ACFT ON RWY CTRLINE. BOTH PLTS STARTED TO NOTICE RUDDER INPUT AT 40 KTS. CHKED RUDDER TRIM INDICATOR AT ZERO. FOR TROUBLESHOOTING MOVED RUDDER TRIM SLIGHTLY L THEN R TO ZERO, FELT NO CHANGE TO PROB. ABORTED TKOF, CALLED FIRE EQUIP TO CHK ACFT. TWR RPTED SMALL AMOUNT OF BRAKE SMOKE FROM L GEAR. THEY SAID IT WAS SAFE AND NO SMOKE ONLY WARM BRAKES. HAD SENIOR MECH VERIFY FINDING OF FIREMAN. TOWED ACFT TO GATE, AND DEPLANED PAX AFTER MAINT WORK AND CHK OF ACFT. FLC PERFORMED VERIFICATION, BY TAXI OUT AND HIGH SPD RWY CHK. THIS WAS ACCOMPLISHED SATISFACTORILY. RETURNED TO GATE FOR BRAKE COOLING AND LOADED PAX. DEPARTED AVA UNEVENTFULLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: AFTER RETURNING TO THE GATE MAINT DID AN EXTENSIVE ACFT INSPECTION. THE RUDDER SYS WAS CHKED. THE TRIM SYS WAS CHKED. THE RUDDER TRIM INDICATOR OP WAS NORMAL. THE ACFT MAIN GEAR WAS JACKED AND DRAGGING BRAKES WERE CHKED. STRUT SVC AND EXTENSION WAS NORMAL. NOTHING ABNORMAL WAS FOUND. THE CREW THEN DUPLICATED THE TKOF ON A TEST EVALUATION, AND NO PROBS WERE FOUND. THE TRIP THEN REDEPARTED WITH NO PROBS.

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.