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NTSB Report
March 11, 1991 · Cessna 120 · N77316
Atigan Pass, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 11, 1991
Injury Outcomes
2 injuries (2 minor injuries)
Location
Atigan Pass, AK
Aircraft
Cessna 120
Tail Number
N77316
Operator
John R Deruyter
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC91LA034
THE PILOT STATED THAT JUST BEFORE REACHING A 4,700 FOOT MOUNTAIN PASS, HE ENCOUNTERED RAPIDLY DETERIORATING FLIGHT VISIBILITY AND WHITEOUT CONDITIONS DUE TO SNOW-COVERED TERRAIN AND FALLING SNOW. HE LOST SIGHT OF THE GROUND AND WAS UNABLE TO TURN THE AIRPLANE AROUND. HE BEGAN A SLOW DESCENT AND CRASH LANDED ON THE SNOW-COVERED MOUNTAINSIDE.
NTSB Probable Cause
THE PILOT CONTINUED TO FLY VFR INTO IFR CONDITIONS. RELATED TO THE ACCIDENT WERE: LOW CEILINGS, WHITEOUT CONDITIONS, AND THE MOUNTAINOUS TERRAIN.
Full Narrative
THE PILOT STATED THAT JUST BEFORE REACHING A 4,700 FOOT MOUNTAIN PASS, HE ENCOUNTERED RAPIDLY DETERIORATING FLIGHT VISIBILITY AND WHITEOUT CONDITIONS DUE TO SNOW-COVERED TERRAIN AND FALLING SNOW. HE LOST SIGHT OF THE GROUND AND WAS UNABLE TO TURN THE AIRPLANE AROUND. HE BEGAN A SLOW DESCENT AND CRASH LANDED ON THE SNOW-COVERED MOUNTAINSIDE.
Flight
Event TypeAccident
Event Time08:15 AKST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 120
Tail NumberN77316
Aircraft CategoryAir
DamageSubstantial
OperatorJohn R Deruyter
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · C-85-12 · Reciprocating · 85
Seats2
People & Injuries
Injury Summary2 injuries (2 minor injuries)
Fatal0
Serious0
Minor2
Uninjured0
Total2
Crew 1Age 39 · First Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility4 sm
CeilingOvercast 6000 ft
Temperature / Dew Point-26 C / 0 C
Altimeter0
Weather SourcePILO