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After touchdown, a DC9 flight crew experienced a severe vibration and the aircraft swerved to the right. The PF maintained directional control and as the aircraft wing began to lower he used opposite control force to keep the wing off the ground. Aircraft was evacuate/evacuationed on the runway after it was stopped.
| Attributes | |
| ACN | 327296 |
| Time | |
| Date | 199602 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | TN |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 260 flight time total : 3161 |
| ASRS Report | 327296 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 300 flight time total : 5700 flight time type : 1000 |
| ASRS Report | 327428 |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : overcame equipment problem other |
| Consequence | other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
Immediately (2 to 3 seconds) after touchdown on runway 31 at bna, I felt a severe vibration. The aircraft began to swerve to the right, and vibration became worse. Vibration had stopped and the wing began to lower to the runway. I (first officer) kept directional control and kept the wing off of the ground with left aileron. The cockpit crew stopped the aircraft on the runway, we did an orderly evacuate/evacuation of the aircraft. Once outside the aircraft I saw that the right main gear was missing from the aircraft. I don't know what caused the gear to separate, nor do I know any corrective action. First officer was flying the aircraft and descent, approach, and landing were all normal and uneventful. Supplemental information from acn 327428: on landing aircraft had structural failure of starboard main mount and subsequently sheared from aircraft. Came to rest just to the right of centerline.
Original NASA ASRS Text
Title: AFTER TOUCHDOWN, A DC9 FLC EXPERIENCED A SEVERE VIBRATION AND THE ACFT SWERVED TO THE R. THE PF MAINTAINED DIRECTIONAL CTL AND AS THE ACFT WING BEGAN TO LOWER HE USED OPPOSITE CTL FORCE TO KEEP THE WING OFF THE GND. ACFT WAS EVACED ON THE RWY AFTER IT WAS STOPPED.
Narrative: IMMEDIATELY (2 TO 3 SECONDS) AFTER TOUCHDOWN ON RWY 31 AT BNA, I FELT A SEVERE VIBRATION. THE ACFT BEGAN TO SWERVE TO THE R, AND VIBRATION BECAME WORSE. VIBRATION HAD STOPPED AND THE WING BEGAN TO LOWER TO THE RWY. I (FO) KEPT DIRECTIONAL CTL AND KEPT THE WING OFF OF THE GND WITH L AILERON. THE COCKPIT CREW STOPPED THE ACFT ON THE RWY, WE DID AN ORDERLY EVAC OF THE ACFT. ONCE OUTSIDE THE ACFT I SAW THAT THE R MAIN GEAR WAS MISSING FROM THE ACFT. I DON'T KNOW WHAT CAUSED THE GEAR TO SEPARATE, NOR DO I KNOW ANY CORRECTIVE ACTION. FO WAS FLYING THE ACFT AND DSCNT, APCH, AND LNDG WERE ALL NORMAL AND UNEVENTFUL. SUPPLEMENTAL INFO FROM ACN 327428: ON LNDG ACFT HAD STRUCTURAL FAILURE OF STARBOARD MAIN MOUNT AND SUBSEQUENTLY SHEARED FROM ACFT. CAME TO REST JUST TO THE R OF CENTERLINE.
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.