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A robinson R-22 in cruise at 1400 ft made an off field landing due to tail rotor vibration and right yawing condition caused by the tail rotor bearing mount bolt failure.
| Attributes | |
| ACN | 401353 |
| Time | |
| Date | 199804 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : mke |
| State Reference | WI |
| Altitude | msl bound lower : 1400 msl bound upper : 1400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mke |
| Operator | general aviation : corporate |
| Make Model Name | Robinson R22 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : single pilot |
| Qualification | pilot : commercial pilot : cfi |
| Experience | flight time last 90 days : 220 flight time total : 945 flight time type : 945 |
| ASRS Report | 401353 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
Vibration, nose right, enter automatic, add power and make a normal landing. Callback conversation with reporter revealed the following information: the reporter stated the machine began to vibrate and yaw to the right so power was added and aircraft automatic rotated to an uneventful off field landing. The reporter said the rotor problem was caused by the rotor bearing mount bolt fracturing. The reporter said a new bolt was installed and the aircraft was returned to service.
Original NASA ASRS Text
Title: A ROBINSON R-22 IN CRUISE AT 1400 FT MADE AN OFF FIELD LNDG DUE TO TAIL ROTOR VIBRATION AND R YAWING CONDITION CAUSED BY THE TAIL ROTOR BEARING MOUNT BOLT FAILURE.
Narrative: VIBRATION, NOSE RIGHT, ENTER AUTO, ADD PWR AND MAKE A NORMAL LNDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MACHINE BEGAN TO VIBRATE AND YAW TO THE R SO PWR WAS ADDED AND ACFT AUTO ROTATED TO AN UNEVENTFUL OFF FIELD LNDG. THE RPTR SAID THE ROTOR PROBLEM WAS CAUSED BY THE ROTOR BEARING MOUNT BOLT FRACTURING. THE RPTR SAID A NEW BOLT WAS INSTALLED AND THE ACFT WAS RETURNED TO SERVICE.
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.