Aviation Accident Summary CHI91LA002

WILLOW SPRINGS, MO, USA

Aircraft #1

N691WM

GULFSTREAM AMERICAN 690B

Analysis

WHILE IN CRUISE FLIGHT, IN INSTRUMENT METEOROLOGICAL CONDITIONS, THE TWIN-ENGINED TURBO-PROP AIRPLANE EXPERIENCED A LARGE STATIC DISCHARGE AND SEVERE TURBULENCE SIMULTANEOUSLY. THE COMBINED EVENT CAUSED THE AIRPLANE TO ENTER A RAPID, UNCONTROLLED, DESCENT DURING WHICH STRUCTURAL OVERLOAD DAMAGE OCCURRED. THE AIRPLANE WAS RECOVERED FROM THE DESCENT IN VISUAL METEOROLOGICAL CONDITIONS AND LANDED AT A NEARBY AIRPORT.

Probable Cause and Findings

THE AIRPLANES ENCOUNTER WITH A STATIC DISCHARGE, TURBULENCE AND A DOWNDRAFT IN THE CLOUDS WHICH WERE ASSOCIATED WITH SEVERE METEOROLOGICAL CONDITIONS.

 

Source: NTSB Aviation Accident Database

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