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NTSB Report
July 10, 1990 · Bell 47-G2 · N6768D
Hatley, WI
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 10, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Hatley, WI
Aircraft
Bell 47-G2
Tail Number
N6768D
Operator
Gitter Gregory C
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI90DEP07
THE HELICOPTER WAS LOADED WITH CHEMICALS FOR AGRICULTURE DISPERSAL ON A TRUCK MOUNTED PLATFORM, TEN FEET ABOVE GROUND LEVEL. ON LIFTOFF THE ENGINE SUSTAINED A PARTIAL POWER REDUCTION DUE TO TWO STICKING INTAKE VALVES. THE AIRCRAFT DESCENDED INTO THE TERRAIN WHEN ALTITUDE PROVED INSUFFICIENT TO EFFECT AN AUTOROTATIONAL FORCED LANDING.
NTSB Probable Cause
THE PARTIAL LOSS OF POWER DUE TO STICKING INTAKE VALVES.
Full Narrative
THE HELICOPTER WAS LOADED WITH CHEMICALS FOR AGRICULTURE DISPERSAL ON A TRUCK MOUNTED PLATFORM, TEN FEET ABOVE GROUND LEVEL. ON LIFTOFF THE ENGINE SUSTAINED A PARTIAL POWER REDUCTION DUE TO TWO STICKING INTAKE VALVES. THE AIRCRAFT DESCENDED INTO THE TERRAIN WHEN ALTITUDE PROVED INSUFFICIENT TO EFFECT AN AUTOROTATIONAL FORCED LANDING.
Flight
Event TypeAccident
Event Time19:05 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 47-G2
Tail NumberN6768D
Aircraft CategoryHeli
DamageSubstantial
OperatorGitter Gregory C
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · VO-435-A1F · Reciprocating · 260
Seats3
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 33 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind290° @ 4 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point61 F
Altimeter30.00 inHg
Observation Time00:45
Weather SourceWFAC