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NTSB Report
April 27, 1989 · Cessna 208A · N9637F
Mt. Zion, IL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 27, 1989
Injury Outcomes
1 injury (1 minor injury)
Location
Mt. Zion, IL
Aircraft
Cessna 208A
Tail Number
N9637F
Operator
Dupage Airport Authority
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
CHI89FA078
DEPARTED MARION WITHOUT A WX BRIEFING. PLT ADVISED DURING APPROACH THAT LAST PERSON MAKING APPROACH REPORTED MODERATE TO SEVERE TURBULENCE ON FINAL. SUBSEQUENTLY CLEARED TO LAND AND GIVEN WIND 360 AT 30 GUSTING 40. ALSO ADVISED THAT ANOTHER AIRCRAFT REPORTED A 20KT WINDSHEAR ON FINAL. THE PILOT REPORTED THAT WHEN HE HAD DESCENDED TO 1500 FEET MSL, THE AIRCRAFT ENCOUNTERED STRONG TURBULENCE AND THE AIRSPEED WENT FROM STALL TO REDLINE. DESPITE ADJUSTMENT TO FLAPS AND THROTTLE, THE AIRPLANE WAS UNCONTROLLABLE.
NTSB Probable Cause
THE PILOT'S INTENTIONAL FLIGHT INTO KNOWN ADVERSE WEATHER. CONTRIBUTING FACTORS WERE THE PILOT'S POOR EVALUATION OF THE WEATHER INFORMATION GIVEN HIM BY THE AIR TRAFFIC CONTROLLERS.
Full Narrative
DEPARTED MARION WITHOUT A WX BRIEFING. PLT ADVISED DURING APPROACH THAT LAST PERSON MAKING APPROACH REPORTED MODERATE TO SEVERE TURBULENCE ON FINAL. SUBSEQUENTLY CLEARED TO LAND AND GIVEN WIND 360 AT 30 GUSTING 40. ALSO ADVISED THAT ANOTHER AIRCRAFT REPORTED A 20KT WINDSHEAR ON FINAL. THE PILOT REPORTED THAT WHEN HE HAD DESCENDED TO 1500 FEET MSL, THE AIRCRAFT ENCOUNTERED STRONG TURBULENCE AND THE AIRSPEED WENT FROM STALL TO REDLINE. DESPITE ADJUSTMENT TO FLAPS AND THROTTLE, THE AIRPLANE WAS UNCONTROLLABLE.
Flight
Event TypeAccident
Event Time21:40 CDT
Nearest AirportDECATUR (0nm N)
Runway36
Runway Length5300 ft
Runway Width150 ft
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 208A
Tail NumberN9637F
Aircraft CategoryAir
DamageSubstantial
OperatorDupage Airport Authority
Operating RulePart 135
Engines1
Engine TypeTurboprop
Engine DetailsP&W · PT6A-114 · Turboprop · 600
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 32 · First Class
Conditions
ConditionsIMC
LightDark Night
Wind10° @ 25 kt, gusting 40 kt
Visibility1 sm
Ceiling2000 ft
Temperature / Dew Point63 F / 59
Altimeter29.00 inHg
Observation Time02:49
Weather SourceWFAC