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A319 flight crew experiences a severe right yaw as thrust is set during the takeoff roll. Captain rejects takeoff at 60 KTS and returns to gate for maintenance.
| Attributes | |
| ACN | 920715 |
| Time | |
| Date | 201011 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Make Model Name | A319 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Taxi |
| Flight Plan | IFR |
| Person 1 | |
| Function | Pilot Flying First Officer |
| Experience | Flight Crew Last 90 Days 90 Flight Crew Total 10000 Flight Crew Type 6000 |
| Person 2 | |
| Function | Pilot Not Flying Captain Check Pilot |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Last 90 Days 180 Flight Crew Total 13750 Flight Crew Type 4135 |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
This was the first leg of a 1 day trip. All preflight and engine starting activities were normal. Crew conducted a single engine taxi to runway 22L. Started right engine with adequate warmup time. Was cleared from hold short line to take off; hence a 'rolling takeoff'. Captain taxied aircraft to runway centerline while advancing the thrust to the check position of 1.05 EPR. All engine indications were normal. Captain passed thrust control to myself; followed by complete control of thrust and flight controls. I then proceeded to advance the power and steer the aircraft with rudder inputs. As takeoff thrust began to develop; the aircraft pulled hard to the right while I instinctively added left rudder to compensate. As the power reached takeoff thrust the airplane proceed to want to pull (yaw) yet harder to the right; requiring a very unusual amount of left rudder; yet was still tracking right of the runway centerline. Control inputs were not consistent with the norm - way out of the normal range in terms of rudder deflection. Rudder input reached about 2/3 travel (left input) when I informed the captain that something was not right. The captain proceeded to execute an abort. Airplane reached a speed of 60 KTS during the event and was about 15 ft right of the centerline when abort was initiated. There was a light crosswind from the right; but in my 12 years of flying this airplane; I know that the control inputs required for this event were way beyond what would normally be needed for 8 KTS crosswind component. Abort was executed flawlessly; with an immediate right turn off of the runway. We stopped the airplane on a taxiway and the captain and I discussed what could be the cause; along with maintenance. It was decided that the safest course of action would be to have the mechanics review this situation; engines; steering; tires; brakes (dragging brake). We taxied to the gate uneventfully; and switched into a new airplane and subsequently departed.
Original NASA ASRS Text
Title: A319 flight crew experiences a severe right yaw as thrust is set during the takeoff roll. Captain rejects takeoff at 60 KTS and returns to gate for maintenance.
Narrative: This was the first leg of a 1 day trip. All preflight and engine starting activities were normal. Crew conducted a single engine taxi to Runway 22L. Started right engine with adequate warmup time. Was cleared from hold short line to take off; hence a 'rolling takeoff'. Captain taxied aircraft to runway centerline while advancing the thrust to the check position of 1.05 EPR. All engine indications were normal. Captain passed thrust control to myself; followed by complete control of thrust and flight controls. I then proceeded to advance the power and steer the aircraft with rudder inputs. As takeoff thrust began to develop; the aircraft pulled hard to the right while I instinctively added left rudder to compensate. As the power reached takeoff thrust the airplane proceed to want to pull (yaw) yet harder to the right; requiring a very unusual amount of left rudder; yet was still tracking right of the runway centerline. Control inputs were not consistent with the norm - way out of the normal range in terms of rudder deflection. Rudder input reached about 2/3 travel (left input) when I informed the Captain that something was not right. The Captain proceeded to execute an abort. Airplane reached a speed of 60 KTS during the event and was about 15 FT right of the centerline when abort was initiated. There was a light crosswind from the right; but in my 12 years of flying this airplane; I know that the control inputs required for this event were way beyond what would normally be needed for 8 KTS crosswind component. Abort was executed flawlessly; with an immediate right turn off of the runway. We stopped the airplane on a taxiway and the Captain and I discussed what could be the cause; along with maintenance. It was decided that the safest course of action would be to have the mechanics review this situation; engines; steering; tires; brakes (dragging Brake). We taxied to the gate uneventfully; and switched into a new airplane and subsequently departed.
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.