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NTSB Report
October 3, 1990 · Gulfstream American 690B · N691WM
Willow Springs, MO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
October 3, 1990
Injury Outcomes
No injuries (3 uninjured)
Location
Willow Springs, MO
Aircraft
Gulfstream American 690B
Tail Number
N691WM
Operator
Wallmart Stores
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI91LA002
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.
NTSB Probable Cause
THE AIRPLANES ENCOUNTER WITH A STATIC DISCHARGE, TURBULENCE AND A DOWNDRAFT IN THE CLOUDS WHICH WERE ASSOCIATED WITH SEVERE METEOROLOGICAL CONDITIONS.
Full Narrative
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.
Flight
Event TypeAccident
Event Time18:20 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftGulfstream American 690B
Tail NumberN691WM
Aircraft CategoryAir
DamageSubstantial
OperatorWallmart Stores
Operating RulePart 91
Engines2
Engine TypeTurboprop
Engine DetailsGarrett · TPE331-5-251K · Turboprop · 720
Seats8
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 46 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 7 kt
Visibility5 sm
CeilingOvercast 1200 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Observation Time00:19
Weather SourceWFAC