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NTSB Report
August 12, 1992 · De Havilland DHC-2 · N8190Y
Crescent Lake, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 12, 1992
Injury Outcomes
1 injury (1 minor injury), 4 uninjured
Location
Crescent Lake, AK
Aircraft
De Havilland DHC-2
Tail Number
N8190Y
Operator
Alaska West Air Service
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC92LA128
APPROXIMATELY 5 SECONDS AFTER LEVELING THE WINGS ON FINAL APPROACH FOR A GLASSY WATER LANDING ON A LARGE LAKE, THE AIRPLANE EXPERIENCED A HARD PREMATURE LANDING. THE FLOATS WERE SEPARATED, AND THE AIRPLANE SANK IMMEDIATELY. THE PILOT SAID THAT BECAUSE OF THE FLAT LIGHTING AND GLASSY WATER CONDITIONS HE LOST HIS DEPTH PERCEPTION AND MISJUDGED HIS ALTITUDE. HE SAID WHEN THE AIRPLANE HIT THE WATER HE THOUGHT HE WAS STILL 70 TO 80 FEET ABOVE THE WATER.
NTSB Probable Cause
THE PILOT'S MISJUDGING HIS ALTITUDE ON FINAL APPROACH. CONTRIBUTING TO THE ACCIDENT WAS THE GLASSY WATER CONDITION.
Full Narrative
APPROXIMATELY 5 SECONDS AFTER LEVELING THE WINGS ON FINAL APPROACH FOR A GLASSY WATER LANDING ON A LARGE LAKE, THE AIRPLANE EXPERIENCED A HARD PREMATURE LANDING. THE FLOATS WERE SEPARATED, AND THE AIRPLANE SANK IMMEDIATELY. THE PILOT SAID THAT BECAUSE OF THE FLAT LIGHTING AND GLASSY WATER CONDITIONS HE LOST HIS DEPTH PERCEPTION AND MISJUDGED HIS ALTITUDE. HE SAID WHEN THE AIRPLANE HIT THE WATER HE THOUGHT HE WAS STILL 70 TO 80 FEET ABOVE THE WATER.
Flight
Event TypeAccident
Event Time11:45 AKDT
Nearest Airport0nm N
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftDe Havilland DHC-2
Tail NumberN8190Y
Aircraft CategoryAir
DamageSubstantial
OperatorAlaska West Air Service
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-985 · Reciprocating · 450
Seats8
People & Injuries
Injury Summary1 injury (1 minor injury), 4 uninjured
Fatal0
Serious0
Minor1
Uninjured4
Total5
Crew 1Age 36 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility5 sm
CeilingOvercast 2500 ft
Temperature / Dew Point54 / 0 C
Altimeter0
Weather SourcePILO