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Md-11 flight crew reported a rejected takeoff following a violent vibration on takeoff.
| Attributes | |
| ACN | 1507642 |
| Time | |
| Date | 201712 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | Mixed |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Route In Use | None |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Nose Gear |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | Pilot Not Flying First Officer |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
During takeoff I rejected the takeoff at 90kts due to a violent vibration during the takeoff roll. We noticed a small vibration during taxi out; but it smoothed out at the end of taxi and before takeoff roll. My thought process was that we were light weight and the tires were cold soaked. We decided to continue and initiate the takeoff. I briefed the takeoff to include if we got a vibration during takeoff that I would reject. The vibration started around 40 kts and continued to get worse as we increased speed. The result was a rejected takeoff. Taxied back to ramp with no assistance required. Maintenance changed both front tires. Maintenance suspected that due to below freezing temps and extended period on the ground the tires developed flat spots. On preflight I noticed some wear on the nose tires but nothing out of the ordinary. I also mentioned to maintenance that we were loaded with an aft cg; light weight and didn't have a lot of weight on the nose which could have contributed to the vibration. Being so light weight and cold temps; the AC accelerates rapidly. After the first officer called 80 kts and the vibration continued; I decided to reject the takeoff. Next takeoff was successful.
Original NASA ASRS Text
Title: MD-11 flight crew reported a rejected takeoff following a violent vibration on takeoff.
Narrative: During takeoff I rejected the takeoff at 90kts due to a violent vibration during the takeoff roll. We noticed a small vibration during taxi out; but it smoothed out at the end of taxi and before takeoff roll. My thought process was that we were light weight and the tires were cold soaked. We decided to continue and initiate the takeoff. I briefed the takeoff to include if we got a vibration during takeoff that I would reject. The vibration started around 40 kts and continued to get worse as we increased speed. The result was a rejected takeoff. Taxied back to ramp with no assistance required. Maintenance changed both front tires. Maintenance suspected that due to below freezing temps and extended period on the ground the tires developed flat spots. On preflight I noticed some wear on the nose tires but nothing out of the ordinary. I also mentioned to maintenance that we were loaded with an aft CG; light weight and didn't have a lot of weight on the nose which could have contributed to the vibration. Being so light weight and cold temps; the AC accelerates rapidly. After the first officer called 80 kts and the vibration continued; I decided to reject the takeoff. Next takeoff was successful.
Data retrieved from NASA's ASRS site 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.