<< >> NASA ASRS Report 856534, October 2009

An A320 experienced unexplained loss of directional control on the takeoff roll. The flight crew rejected the takeoff and returned to the gate for maintenance.

Attributes
ACN	856534
Time
Date	200910
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 240 Flight Crew Total 11220 Flight Crew Type 3000
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 15000 Flight Crew Type 2000
Events
Anomaly	Inflight Event / Encounter Loss Of Aircraft Control

Narrative:

During takeoff roll at approximately 60 kts aircraft swerved to the left. Captain applied rudder to correct back and then experienced a more severe swerve at approximately 80 kts that required full right rudder; at which time the captain called for an abort at 85 kts. Autobrakes deployed and the aircraft came to a stop. I advised the tower we were aborting and made a P.a. To the passengers to remain seated. Taxied off the runway and returned to the gate for maintenance.

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Original NASA ASRS Text

Title: An A320 experienced unexplained loss of directional control on the takeoff roll. The Flight Crew rejected the takeoff and returned to the gate for maintenance.

Narrative: During takeoff roll at approximately 60 kts aircraft swerved to the left. Captain applied rudder to correct back and then experienced a more severe swerve at approximately 80 kts that required full right rudder; at which time the Captain called for an abort at 85 kts. Autobrakes deployed and the aircraft came to a stop. I advised the tower we were aborting and made a P.A. to the passengers to remain seated. Taxied off the runway and returned to the gate for maintenance.

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.