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NTSB Report
December 7, 1992 · Bell 47G3-B2A · N58131
Montpelier, ID
Overview
Report Status
Probable Cause
Event Type
Accident
Date
December 7, 1992
Injury Outcomes
No injuries (3 uninjured)
Location
Montpelier, ID
Aircraft
Bell 47G3-B2A
Tail Number
N58131
Operator
Wood Brent V
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA93LA034
THE PILOT DISCONTINUED A WILD GAME SURVEY FLIGHT IN MOUNTAINOUS TERRAIN WHEN THE ENGINE BEGAN RUNNING ROUGH, AND INITIATED A PRECAUTIONARY LANDING TO A ROAD NEARBY. THE ENGINE LOST POWER ON FINAL APPROACH ABOUT 50 FT. AGL AT A SLOW AIRSPEED AND THE HELICOPTER LANDED HARD. EXAMINATION OF THE CARBURETOR REVEALED DAMAGED AND LEAKING SEALS. THE CARBURETOR HAD BEEN REPAIRED AS NEEDED BY AN ACFT REPAIR STATION ABOUT TWO MONTHS BEFORE THE ACCIDENT.
NTSB Probable Cause
THE LOSS OF ENGINE POWER DUE TO LEAKING INTERNAL CARBURETOR SEALS, RESULTING FROM IMPROPER REPAIR OF THE CARBURETOR BY AN ACFT REPAIR STATION.
Full Narrative
THE PILOT DISCONTINUED A WILD GAME SURVEY FLIGHT IN MOUNTAINOUS TERRAIN WHEN THE ENGINE BEGAN RUNNING ROUGH, AND INITIATED A PRECAUTIONARY LANDING TO A ROAD NEARBY. THE ENGINE LOST POWER ON FINAL APPROACH ABOUT 50 FT. AGL AT A SLOW AIRSPEED AND THE HELICOPTER LANDED HARD. EXAMINATION OF THE CARBURETOR REVEALED DAMAGED AND LEAKING SEALS. THE CARBURETOR HAD BEEN REPAIRED AS NEEDED BY AN ACFT REPAIR STATION ABOUT TWO MONTHS BEFORE THE ACCIDENT.
Flight
Event TypeAccident
Event Time10:15 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 47G3-B2A
Tail NumberN58131
Aircraft CategoryHeli
DamageSubstantial
OperatorWood Brent V
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · TVO-435-F1A · Reciprocating · 280
Seats3
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 43 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility15 sm
CeilingBroken clouds 5500 ft
Temperature / Dew Point12 C / 9 C
Altimeter29.00 inHg
Observation Time16:57
Weather SourceWFAC