|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||MD-80 Series (DC-9-80) Undifferentiated or Other Model|
|Operating Under FAR Part||Part 121|
|Flight Phase||ground : takeoff roll|
|Affiliation||company : air carrier|
|Function||flight crew : captain|
oversight : pic
|Anomaly||aircraft equipment problem : less severe|
|Independent Detector||other flight crewa|
|Resolutory Action||flight crew : rejected takeoff|
Severe aircraft vibration noted just after takeoff power was added. Aircraft speed had reached approximately 20 KTS. Takeoff was aborted and aircraft taxied normally back to the gate for a maintenance inspection. Callback conversation with reporter revealed the following information: reporter stated that his aircraft on that flight was unusually light and so accelerated very rapidly. Coincidentally the departure runway has elevated runway centerline lights and because the aircraft accelerated very rapidly due to its light weight; it crossed over the runway lights rapidly. As the nose tires crossed over the lights they began shimmying; creating an airframe vibration. The crew did not know why the vibration developed and because of the severity the takeoff was rejected. The only discrepancy that the mechanic found was one of the nose tires was over inflated. The aircraft was flown several hours later with normal operation.
Original NASA ASRS Text
Title: A MD80 SEVERE VIBRATION CAUSED THE PILOT TO REJECT A TKOF AT ABOUT 20 KTS WITH TKOF PWR. NOSE TIRE INFLATION AND ELEVATED RWY LIGHTS CONTRIBUTED.
Narrative: SEVERE ACFT VIBRATION NOTED JUST AFTER TKOF PWR WAS ADDED. ACFT SPD HAD REACHED APPROX 20 KTS. TKOF WAS ABORTED AND ACFT TAXIED NORMALLY BACK TO THE GATE FOR A MAINT INSPECTION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THAT HIS ACFT ON THAT FLT WAS UNUSUALLY LIGHT AND SO ACCELERATED VERY RAPIDLY. COINCIDENTALLY THE DEPARTURE RWY HAS ELEVATED RWY CENTERLINE LIGHTS AND BECAUSE THE ACFT ACCELERATED VERY RAPIDLY DUE TO ITS LIGHT WT; IT CROSSED OVER THE RWY LIGHTS RAPIDLY. AS THE NOSE TIRES CROSSED OVER THE LIGHTS THEY BEGAN SHIMMYING; CREATING AN AIRFRAME VIBRATION. THE CREW DID NOT KNOW WHY THE VIBRATION DEVELOPED AND BECAUSE OF THE SEVERITY THE TKOF WAS REJECTED. THE ONLY DISCREPANCY THAT THE MECHANIC FOUND WAS ONE OF THE NOSE TIRES WAS OVER INFLATED. THE ACFT WAS FLOWN SEVERAL HOURS LATER WITH NORMAL OPERATION.
Data retrieved from NASA's ASRS site as of January 2009 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.