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NTSB Report
August 4, 1988 · Bell UH-1E · N151LC
North Bend, OR
Overview
Report Status
Preliminary report
Event Type
Accident
Date
August 4, 1988
Injury Outcomes
1 injury (1 minor injury)
Location
North Bend, OR
Aircraft
Bell UH-1E
Tail Number
N151LC
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
SEA88LA143
DRG A LOGGING OPN, THE PLT NOTED AN APPARENT TRANSMISSION MALFUNCTION. AN AUTOROTATIVE LANDING WAS MADE ON UNPREPARED TERRAIN & THE HELICOPTER WAS DAMAGED. AN INVESTIGATION REVEALED THE TAIL ROTOR DRIVE INPUT GEAR IN THE 42 DEG GEARBOX HAD FAILED FROM FATIGUE. N151LC WAS A MILITARY SURPLUS HELICOPTER. THE GEARBOX HAD BEEN OVERHAULED ON 6/15/87. THE OPERATOR'S RECORDS SHOWED IT HAD BEEN IN SERVICE FOR 373 HRS SINCE OVERHAUL.
Full Narrative
DRG A LOGGING OPN, THE PLT NOTED AN APPARENT TRANSMISSION MALFUNCTION. AN AUTOROTATIVE LANDING WAS MADE ON UNPREPARED TERRAIN & THE HELICOPTER WAS DAMAGED. AN INVESTIGATION REVEALED THE TAIL ROTOR DRIVE INPUT GEAR IN THE 42 DEG GEARBOX HAD FAILED FROM FATIGUE. N151LC WAS A MILITARY SURPLUS HELICOPTER. THE GEARBOX HAD BEEN OVERHAULED ON 6/15/87. THE OPERATOR'S RECORDS SHOWED IT HAD BEEN IN SERVICE FOR 373 HRS SINCE OVERHAUL.
Flight
Event TypeAccident
Event Time09:30 PDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell UH-1E
Tail NumberN151LC
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 133
Engines1
Engine TypeTurboshaft
Engine DetailsLycoming · T53-L-13B · Turboshaft · 1400
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 38 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind340° @ 5 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter0
Weather SourcePILO