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NTSB Report
June 20, 1989 · Piper PA-23-250 · N6471Y
Stanley, ID
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 20, 1989
Injury Outcomes
3 injuries (3 fatalities)
Location
Stanley, ID
Aircraft
Piper PA-23-250
Tail Number
N6471Y
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
SEA89FA113
AIRCRAFT WAS OBSERVED FLYING ABOUT 800 FT AGL ALONG A RIVER IN A MOUNTAIN VALLEY WITH STEEP HIGH TERRAIN ON BOTH SIDES. SUBSEQUENTLY, IT FLEW INTO SNOW SQUALL, IMPACTED TREES 6000 FT MSL ON HILLSIDE 1/4 MILE FROM THE RIVER. PLT BRIEFED ON MOUNTAIN OBSCURATIONS, ADVISED TO UPDATE WEATHER LATER IN FLIGHT.
NTSB Probable Cause
PILOT CONTINUED VFR FLIGHT INTO IMC CONDITIONS IN MOUNTAINOUS TERRAIN. FACTORS WERE SNOW SQUALLS AND OBSCURED MOUNTAINOUS TERRAIN IN THE AREA.
Full Narrative
AIRCRAFT WAS OBSERVED FLYING ABOUT 800 FT AGL ALONG A RIVER IN A MOUNTAIN VALLEY WITH STEEP HIGH TERRAIN ON BOTH SIDES. SUBSEQUENTLY, IT FLEW INTO SNOW SQUALL, IMPACTED TREES 6000 FT MSL ON HILLSIDE 1/4 MILE FROM THE RIVER. PLT BRIEFED ON MOUNTAIN OBSCURATIONS, ADVISED TO UPDATE WEATHER LATER IN FLIGHT.
Flight
Event TypeAccident
Event Time13:15 MDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledVFR
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-23-250
Tail NumberN6471Y
Aircraft CategoryAir
DamageDestroyed
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · IO-540 · Reciprocating · 250
Seats6
People & Injuries
Injury Summary3 injuries (3 fatalities)
Fatal3
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 38 · Second Class
Conditions
ConditionsIMC
LightDaylight
Wind330° @ 25 kt, gusting 32 kt
Visibility50 sm
CeilingOvercast 3000 ft
Temperature / Dew Point45 C / 28 C
Altimeter30.00 inHg
Observation Time19:49
Weather SourceWIT