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NTSB Report
August 8, 1982 · Bell 47G-3B-L · N8529F
Kaycee, WY
Overview
Report Status
Preliminary report
Event Type
Accident
Date
August 8, 1982
Injury Outcomes
1 injury (1 fatality)
Location
Kaycee, WY
Aircraft
Bell 47G-3B-L
Tail Number
N8529F
Operator
John C Miller
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN82FTC09
THE PILOT WAS HAVING COOLING FAN PROBLEMS, SOME BLADES HAD BROKEN. HE LANDED IN A CANYON STAYED OVERNIGHT TO COOL ENGINE AND PLANNED TO FLY TO TOP OF THE CANYON TO GET REPAIRS. AFTER TAKEOFF, THE HELICOPTER HAD CLIMBED ALMOST LEVEL WITH THE TOP OF THE CANYON WHEN THE ENGINE FAILED. DURING AN EMERGENCY LANDING, THE HELICOPTER HIT THE TOPS OF 3 TREES, THEN CRASHED ON ITS TOP. AN EXAMINATION OF THE COOLING FAN REVEALED THAT IT WAS WORN, HAD REWORKED PARTS, CONTAINED INCORRECT PARTS, AND 13 FATIQUE CRACKS WERE FOUND IN THE FAN.
Full Narrative
THE PILOT WAS HAVING COOLING FAN PROBLEMS, SOME BLADES HAD BROKEN. HE LANDED IN A CANYON STAYED OVERNIGHT TO COOL ENGINE AND PLANNED TO FLY TO TOP OF THE CANYON TO GET REPAIRS. AFTER TAKEOFF, THE HELICOPTER HAD CLIMBED ALMOST LEVEL WITH THE TOP OF THE CANYON WHEN THE ENGINE FAILED. DURING AN EMERGENCY LANDING, THE HELICOPTER HIT THE TOPS OF 3 TREES, THEN CRASHED ON ITS TOP. AN EXAMINATION OF THE COOLING FAN REVEALED THAT IT WAS WORN, HAD REWORKED PARTS, CONTAINED INCORRECT PARTS, AND 13 FATIQUE CRACKS WERE FOUND IN THE FAN.
Flight
Event TypeAccident
Event Time08:00 MDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftBell 47G-3B-L
Tail NumberN8529F
Aircraft CategoryHeli
DamageDestroyed
OperatorJohn C Miller
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · TVO-435 · Reciprocating · 280
Seats3
People & Injuries
Injury Summary1 injury (1 fatality)
Fatal1
Serious0
Minor0
Uninjured0
Total1
Crew 1Age 46 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility50 sm
CeilingNone
Temperature / Dew Point14 C / 0 C
Altimeter0