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NTSB Report
November 25, 1990 · Cessna 170 · N4030V
40 W Of Clear, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 25, 1990
Injury Outcomes
1 injury (1 fatality)
Location
40 W Of Clear, AK
Aircraft
Cessna 170
Tail Number
N4030V
Operator
Theodore F Monroe
Injuries
Fatal
Aircraft Damage
Substantial
NTSB Number
ANC91FA014
ACCORDING TO WITNESSES, THE AIRPLANE LANDED AT WIEN LAKE AT 1200 ALASKA STANDARD TIME (A.S.T) AND THE WEATHER WAS VERY POOR. WITNESSES DESCRIBED VISIBILITY AS 600 FEET WITH FALLING BLOWING SNOW. THE AIRPLANE DEPARTED WIEN LAKE AT 1330 A.S.T., AND THE WITNESSES AGAIN DESCRIBED THE WEATHER AS VERY POOR. THEY WERE UNABLE TO SEE THE ENTIRE TAKEOFF RUN DUE TO VISIBILITY. THEY HEARD THE ENGINE OPERATING AT WHAT THEY DESCRIBED AS FULL POWER UNTIL THEY HEARD A LOUD THUMP. ALL ENGINE NOISE CEASED AT THAT TIME. THERE IS NO OFFICIAL WEATHER OBSERVATION STATION AT THE ACCIDENT SITE. THERE WERE NO MECHANICAL IRREGULARITIES FOUND WITH THE AIRPLANE. THE PILOT-IN-COMMAND WAS NOT INSTRUMENT RATED.
NTSB Probable Cause
THE NON-INSTRUMENT RATED PILOT-IN-COMMAND'S LOSS OF CONTROL WHILE ATTEMPTING TO OPERATE UNDER VISUAL FLIGHT RULE WHILE IN INSTRUMENT METEOROLOGICAL CONDITIONS. CONTRIBUTING TO THE ACCIDENT WAS THE WHITEOUT CONDITION CREATED BY THE VAST EXPANSE OF WHITE LAKE SURFACE, AND THE BLOWING SNOW WHICH FURTHER REDUCED THE VISIBILITY.
Full Narrative
ACCORDING TO WITNESSES, THE AIRPLANE LANDED AT WIEN LAKE AT 1200 ALASKA STANDARD TIME (A.S.T) AND THE WEATHER WAS VERY POOR. WITNESSES DESCRIBED VISIBILITY AS 600 FEET WITH FALLING BLOWING SNOW. THE AIRPLANE DEPARTED WIEN LAKE AT 1330 A.S.T., AND THE WITNESSES AGAIN DESCRIBED THE WEATHER AS VERY POOR. THEY WERE UNABLE TO SEE THE ENTIRE TAKEOFF RUN DUE TO VISIBILITY. THEY HEARD THE ENGINE OPERATING AT WHAT THEY DESCRIBED AS FULL POWER UNTIL THEY HEARD A LOUD THUMP. ALL ENGINE NOISE CEASED AT THAT TIME. THERE IS NO OFFICIAL WEATHER OBSERVATION STATION AT THE ACCIDENT SITE. THERE WERE NO MECHANICAL IRREGULARITIES FOUND WITH THE AIRPLANE. THE PILOT-IN-COMMAND WAS NOT INSTRUMENT RATED.
Flight
Event TypeAccident
Event Time08:30 AKST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 170
Tail NumberN4030V
Aircraft CategoryAir
DamageSubstantial
OperatorTheodore F Monroe
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · C-145-2 · Reciprocating · 145
Seats4
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 42 · Third Class
Conditions
ConditionsIMC
LightDaylight
Wind360° @ 10 kt, gusting 15 kt
CeilingNone
Temperature / Dew Point25 C / 0 C
Altimeter0
Weather SourceWIT