MIA85LA185

1985-06-08 · ST.PETERSBURG, Florida, United States · None · 1 aircraft · Status: Completed

Airport SPG

Aircraft involved

N8657F Hughes 269C None

Factual narrative

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. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1985_MIA85LA185.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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