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NTSB Report
September 5, 1983 · Bell 205A-1 · N58034
Elk Rock, WA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
September 5, 1983
Injury Outcomes
12 injuries (7 serious injuries, 5 minor injuries)
Location
Elk Rock, WA
Aircraft
Bell 205A-1
Tail Number
N58034
Injuries
Serious
Aircraft Damage
Destroyed
NTSB Number
SEA83FA198
THE ACFT WAS CLIMBING THRU ABOUT 800 FT AGL, WHEN THE PLT NOTED A SEVERE SHUDDER & VIBRATION. HE LOWERED THE COLLECTIVE, THEN NOTICED THAT THE N2 & ROTOR RPM WERE PEGGED AT 110%. AS HE REAPPLIED THE COLLECTIVE TO STOP THE OVERSPEED, HE NOTED A LOSS OF THRUST & BEGAN AN AUTOROTATION. THE ONLY SUITABLE AREA OF LAND WAS ON A MUD FLOWN. THE PLT WAS UNABLE TO TURN INTO THE WIND IN THE LANDING AREA. SUBSEQUENTLY, THE HELICOPTER RECEIVED EXTENSIVE DAMAGE DURING AN AUTOROTATIVE LANDING, DOWNWIND, ON ROUGH TERRAIN. A DISASSEMBLY & EXAM OF THE ENG REVEALED THAT THE SHAFT BEARING (#21), PN 1-300-082-01, AND THE N2 TACHOMETER DRIVE SPUR GEAR, PN 1-070-062-04, HAD FAILED. FATIGUE WAS FOUND ON THE SPUR GEAR.
Full Narrative
THE ACFT WAS CLIMBING THRU ABOUT 800 FT AGL, WHEN THE PLT NOTED A SEVERE SHUDDER & VIBRATION. HE LOWERED THE COLLECTIVE, THEN NOTICED THAT THE N2 & ROTOR RPM WERE PEGGED AT 110%. AS HE REAPPLIED THE COLLECTIVE TO STOP THE OVERSPEED, HE NOTED A LOSS OF THRUST & BEGAN AN AUTOROTATION. THE ONLY SUITABLE AREA OF LAND WAS ON A MUD FLOWN. THE PLT WAS UNABLE TO TURN INTO THE WIND IN THE LANDING AREA. SUBSEQUENTLY, THE HELICOPTER RECEIVED EXTENSIVE DAMAGE DURING AN AUTOROTATIVE LANDING, DOWNWIND, ON ROUGH TERRAIN. A DISASSEMBLY & EXAM OF THE ENG REVEALED THAT THE SHAFT BEARING (#21), PN 1-300-082-01, AND THE N2 TACHOMETER DRIVE SPUR GEAR, PN 1-070-062-04, HAD FAILED. FATIGUE WAS FOUND ON THE SPUR GEAR.
Flight
Event TypeAccident
Event Time13:10 PDT
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 205A-1
Tail NumberN58034
Aircraft CategoryHeli
DamageDestroyed
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsLycoming · T53-13B · Turboshaft · 1250
Seats15
People & Injuries
Injury Summary12 injuries (7 serious injuries, 5 minor injuries)
Fatal0
Serious7
Minor5
Uninjured0
Total12
Crew 1Age 35 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind200° @ 11 kt
Visibility15 sm
CeilingBroken clouds 5000 ft
Temperature / Dew Point0 C
Altimeter0
Weather SourceWIT