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NTSB Report
January 3, 1988 · Bell 47D1 · N175K
Fontana, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
January 3, 1988
Injury Outcomes
No injuries (1 uninjured)
Location
Fontana, CA
Aircraft
Bell 47D1
Tail Number
N175K
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX88LA080
DURING A SOLO INSTRUCTIONAL FLIGHT, THE PLT REPORTED THAT HE HEARD A LOUD BANG. THE ACFT BEGAN AN UNCONTROLLED SPINNING DESCENT TO THE RIGHT AND COLLIDED WITH THE TERRAIN. A TAIL ROTOR BLADE WAS FOUND TO HAVE SEPARATED FROM THE TAIL ROTOR. A METALLURGICAL EXAMINATION OF THE TAIL ROTOR YOKE REVEALED THAT THE YOKE FAILED DUE TO HIGH CYCLE FATIGUE.
Full Narrative
DURING A SOLO INSTRUCTIONAL FLIGHT, THE PLT REPORTED THAT HE HEARD A LOUD BANG. THE ACFT BEGAN AN UNCONTROLLED SPINNING DESCENT TO THE RIGHT AND COLLIDED WITH THE TERRAIN. A TAIL ROTOR BLADE WAS FOUND TO HAVE SEPARATED FROM THE TAIL ROTOR. A METALLURGICAL EXAMINATION OF THE TAIL ROTOR YOKE REVEALED THAT THE YOKE FAILED DUE TO HIGH CYCLE FATIGUE.
Flight
Event TypeAccident
Event Time11:25 PST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 47D1
Tail NumberN175K
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6V335-A · Reciprocating · 210
Seats3
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 42 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility40 sm
CeilingOvercast 20000 ft
Temperature / Dew Point61 F / 30 C
Altimeter30.00 inHg
Observation Time18:57
Weather SourceWFAC