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NTSB Report
June 9, 1990 · Lake LA-4 · N68DG
Onalaska, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 9, 1990
Injury Outcomes
3 injuries (3 fatalities)
Location
Onalaska, WA
Aircraft
Lake LA-4
Tail Number
N68DG
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
SEA90FA171
BEFORE DEPG ON A FLT FROM NEWPORT, OR, TO RENTON WA, THE PLT OBTAINED A WX BRIEFING. HE WAS ADZD THAT THE WX WAS MARGINAL VFR & FORECAST TO BE VARIABLE IMC ALONG THE ROUTE. HE DID NOT DECLARE HIS INTENTIONS OR FILE A FLT PLAN, BUT TOOK OFF ABOUT 2 HRS LATER. WHEN THE ACFT DID NOT ARRIVE, A SEARCH WAS MADE. IT WAS NOT FOUND UNTIL 8/24/90. THE PLANE HAD CRASHED ON WOODED/MOUTAINOUS TERRAIN, NEAR THE HEAD OF A CANYON AT AN ELEV OF ABOUT 1800'. IMPACT OCCURRED ON A HEADING OF 165 DEG; ENTRANCE TO THE CANYON WAS SOUTH OF THE CRASH SITE. NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT OR ENG WAS FOUND. APRX 16 MI SSW AT TOLEDO (ELEV 371'), THE 1345 PDT WX WAS IN PART: 1200' OVC, 8 MI VIS WITH LIGHT RAIN, WIND FROM 330 DEG AT 9 KTS.
NTSB Probable Cause
IMPROPER IN-FLIGHT PLANNING/DECISION BY THE PILOT, AND HIS INADVERTENT FLIGHT INTO INSTRUMENT METEOROLOGICAL CONDITIONS (IMC). FACTORS RELATED TO THE ACCIDENT WERE: THE ADVERSE WEATHER AND TERRAIN CONDITIONS.
Full Narrative
BEFORE DEPG ON A FLT FROM NEWPORT, OR, TO RENTON WA, THE PLT OBTAINED A WX BRIEFING. HE WAS ADZD THAT THE WX WAS MARGINAL VFR & FORECAST TO BE VARIABLE IMC ALONG THE ROUTE. HE DID NOT DECLARE HIS INTENTIONS OR FILE A FLT PLAN, BUT TOOK OFF ABOUT 2 HRS LATER. WHEN THE ACFT DID NOT ARRIVE, A SEARCH WAS MADE. IT WAS NOT FOUND UNTIL 8/24/90. THE PLANE HAD CRASHED ON WOODED/MOUTAINOUS TERRAIN, NEAR THE HEAD OF A CANYON AT AN ELEV OF ABOUT 1800'. IMPACT OCCURRED ON A HEADING OF 165 DEG; ENTRANCE TO THE CANYON WAS SOUTH OF THE CRASH SITE. NO PREIMPACT PART FAILURE OR MALFUNCTION OF THE ACFT OR ENG WAS FOUND. APRX 16 MI SSW AT TOLEDO (ELEV 371'), THE 1345 PDT WX WAS IN PART: 1200' OVC, 8 MI VIS WITH LIGHT RAIN, WIND FROM 330 DEG AT 9 KTS.
Flight
Event TypeAccident
Event Time13:30 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftLake LA-4
Tail NumberN68DG
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-360-A1A · Reciprocating · 180
Seats4
People & Injuries
Injury Summary3 injuries (3 fatalities)
Fatal3
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 51 · Third Class
Conditions
ConditionsIMC
LightDaylight
Wind330° @ 9 kt
CeilingNone
Temperature / Dew Point55 / 52
Altimeter29.00 inHg
Observation Time20:45
Weather SourceWFAC