NTSB Identification: MIA85LA185.
The docket is stored on NTSB microfiche number 28723.
Accident occurred Saturday, June 08, 1985 in ST.PETERSBURG, FL
Aircraft: HUGHES 269C, registration: N8657F
Injuries: 2 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE HELICOPTER WAS LANDING AFTER A TRAINING FLIGHT WITH AN INSTRUCTOR PILOT AND A NON-RATED-NON-CERTIFICATED STUDENT PILOT ON BOARD. AS THE HELICOPTER TOUCHED DOWN A SEVERE RESONANT VIBRATION STARTED. THE INSTRUCTOR STATED THAT HE ATTEMPTED TO LIFT OFF THE GROUND BUT THE COLLECTIVE IMPUT GAVE NO RESPONSE. THE CLUTCH PULLEY BRACKET WAS FOUND FAILED DUE TO OVERLOAD. WITNESSES DESCRIBED THE VIBRATION AS TYPICAL OF GROUND RESONANCE.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FLIGHT CONTROLS..IMPROPER USE OF..PILOT IN COMMAND


Contributing Factors

LANDING GEAR,SKID ASSEMBLY..FAILURE,TOTAL


Contributing Factors

ROTOR DRIVE SYSTEM,CLUTCH ASSEMBLY..FAILURE,TOTAL

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