BRANDYWINE, MD, USA
N582H
ENSTROM F28C
IN LEVEL CRUISE FLT THE PLT EXPERIENCED A SEVERE VIBRATION FOLLOWED BY UNCONTROLLABLE ROTATION TO THE RIGHT. THE PLT WASUNABLE TO REGAIN DIRECTIONAL CONTROL & CRASHED INTO TREES. INVESTIGATION REVEALED THAT THE REAR T/R DRIVE COUPLING, PN28-13609, HAD FAILED FROM EXCESSIVE WEAR DUE TO INADEQUATE LUBRICATION. SERVICE BULLETIN 0065, DATED 8/19/83, WAS ISSUED DIRECTING INSPECTION OF THE COUPLING BEFORE THE NEXT FLT. AD83-18-04, AMENDMENT 39-4721, WAS ALSO ISSUED TO PRECLUDE FURTHER FAILURES.
Source: NTSB Aviation Accident Database
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