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NTSB Report
July 12, 1985 · Beech B36TC · N948ST
Idaho City, ID
Overview
Report Status
Preliminary report
Event Type
Accident
Date
July 12, 1985
Injury Outcomes
2 injuries (2 fatalities)
Location
Idaho City, ID
Aircraft
Beech B36TC
Tail Number
N948ST
Operator
Michael E Quesnoy
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
SEA85FA162
THE PLT FAILED TO OBTAIN A PREFLT WX BRIEFING PRIOR TO DEPARTING BOTH BUTTE, MT, AND SALMON, ID. EN ROUTE AT FL180 HE ENTERED INSTRUMENT AND ICING CONDITIONS WHICH HE ATTEMPTED TO AVOID BY CLIMBING TO FL200. DURING THE CLIMB, THE PLT REPORTED ENCOUNTERING SEVERE TURBULENCE ASSOCIATED WITH DEVELOPING CUMULONIMBUS ACTIVITY. CONTROL OF THE ACFT WAS LOST AND THE ACFT DESCENDED TO GROUND IMPACT.
Full Narrative
THE PLT FAILED TO OBTAIN A PREFLT WX BRIEFING PRIOR TO DEPARTING BOTH BUTTE, MT, AND SALMON, ID. EN ROUTE AT FL180 HE ENTERED INSTRUMENT AND ICING CONDITIONS WHICH HE ATTEMPTED TO AVOID BY CLIMBING TO FL200. DURING THE CLIMB, THE PLT REPORTED ENCOUNTERING SEVERE TURBULENCE ASSOCIATED WITH DEVELOPING CUMULONIMBUS ACTIVITY. CONTROL OF THE ACFT WAS LOST AND THE ACFT DESCENDED TO GROUND IMPACT.
Flight
Event TypeAccident
Event Time10:27 MDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftBeech B36TC
Tail NumberN948ST
Aircraft CategoryAir
DamageDestroyed
OperatorMichael E Quesnoy
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-UB · Reciprocating · 300
Seats6
People & Injuries
Injury Summary2 injuries (2 fatalities)
Fatal2
Serious0
Minor0
Uninjured0
Total2
Crew 1Age 41 · Third Class
Conditions
ConditionsUnknown
LightDaylight
Wind20° @ 7 kt
Visibility10 sm
CeilingBroken clouds 14000 ft
Temperature / Dew Point55
Altimeter30.00 inHg
Observation Time16:48
Weather SourceWFAC