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NTSB Report
January 12, 1990 · Cessna 207A · N9720M
Nondalton, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 12, 1990
Injury Outcomes
No injuries (6 uninjured)
Location
Nondalton, AK
Aircraft
Cessna 207A
Tail Number
N9720M
Operator
Iliamna Air Taxi
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC90LA026
OPER PSNL RPRTD THAT DURING THE TAKEOFF ROLL, THE PLT ENCTRD PARTIAL WHITEOUT CONDITIONS & HAD DIFFICULTY DEFINING THE EDGE OF THE RWY FROM ADJACENT SNOW BERMS. HE ABORTED THE TAKEOFF, BUT THE ACFT ENCTRD A SNOW BERM ON THE LEFT. IT THEN VEERED FURTHER LEFT & WAS DAMAGED. ORANGE MARKERS HAD BEEN PLACED AT THE RWY EDGES, BUT THEY WERE LOCATED ALONG THE OUTSIDE EDGES OF THE BERMS & WERE NOT CLEARLY VISIBLE TO THE PLT.
NTSB Probable Cause
IMPROPER PLANNING/DECISION BY THE PILOT. FACTORS RELATED TO THE ACCIDENT WERE: INADEQUATE POSITIONING OF THE TEMPORARY RUNWAY MARKERS, SNOW COVERED RUNWAY/TERRAIN CONDITIONS, PARTIAL WHITEOUT CONDITION, AND THE SNOW BERMS AT THE EDGES OF THE RUNWAY.
Full Narrative
OPER PSNL RPRTD THAT DURING THE TAKEOFF ROLL, THE PLT ENCTRD PARTIAL WHITEOUT CONDITIONS & HAD DIFFICULTY DEFINING THE EDGE OF THE RWY FROM ADJACENT SNOW BERMS. HE ABORTED THE TAKEOFF, BUT THE ACFT ENCTRD A SNOW BERM ON THE LEFT. IT THEN VEERED FURTHER LEFT & WAS DAMAGED. ORANGE MARKERS HAD BEEN PLACED AT THE RWY EDGES, BUT THEY WERE LOCATED ALONG THE OUTSIDE EDGES OF THE BERMS & WERE NOT CLEARLY VISIBLE TO THE PLT.
Flight
Event TypeAccident
Event Time06:15 AKST
Nearest AirportNondalton (0nm N)
Runway20
Runway Length2700 ft
Runway Width60 ft
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 207A
Tail NumberN9720M
Aircraft CategoryAir
DamageSubstantial
OperatorIliamna Air Taxi
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-520-F13 · Reciprocating · 300
Seats7
People & Injuries
Injury SummaryNo injuries (6 uninjured)
Fatal0
Serious0
Minor0
Uninjured6
Total6
Crew 1Age 42 · First Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility3 sm
CeilingBroken clouds 800 ft
Temperature / Dew Point25 C / 19 C
Altimeter29.00 inHg
Weather SourcePILO