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SEA85LA079

1985-03-20 · ELMA, Washington, United States · None · 1 aircraft · Status: Completed

Airport WA22

Aircraft involved

Factual narrative

JUST PRIOR TO LIFT-OFF A VIBRATION ACCOMPANIED BY LATERAL ROCKING OCCURRED. ALTHOUGH THE PLT BROUGHT THE POWER TO IDLE. THE HELICOPTER HAD ALREADY STARTED TO COME APART. DURING ENGINE EXAMINATION IT WAS FOUND THAT THE GROUND RESONANCE OCCURRED DUE TO UNDER TO RQ WING OF THE MAIN ROTOR DAMPNERS. THE DAMPNERS HAD BEEN SERVICED JUST 1.5 HOURS PRIOR TO THIS ACCIDENT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1985_SEA85LA079.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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