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NTSB Report
April 29, 1984 · Hughes 369D · N779FA
Toutle, WA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 29, 1984
Injury Outcomes
No injuries (1 uninjured)
Location
Toutle, WA
Aircraft
Hughes 369D
Tail Number
N779FA
Operator
Michael L Obrien
Injuries
None
Aircraft Damage
Substantial
NTSB Number
SEA84LA096
PLT WAS OPERATING HELICOPTER AT 120 FT AGL WITH THE AUX FUEL PUMP ON WHEN A TTL LOSS OF PWR OCCURRED. AUTOROTATION WAS ENTERED BUT A HARD LANDING RESULTED IN THE MAIN ROTOR BLADES CUTTING OFF THE TAIL BOOM. INVESTIGATION REVEALED A FUEL SAMPLE TAKEN FROM THE ENGINE FUEL PUMP FILTER CHAMBER CONTAINED SEVERAL DIFFERENT TYPES OF CONTAMINTATION PARTICLES. SOME OF WHICH WERE FROM A DETERIORATING FUEL PUMP BUSHING.
Full Narrative
PLT WAS OPERATING HELICOPTER AT 120 FT AGL WITH THE AUX FUEL PUMP ON WHEN A TTL LOSS OF PWR OCCURRED. AUTOROTATION WAS ENTERED BUT A HARD LANDING RESULTED IN THE MAIN ROTOR BLADES CUTTING OFF THE TAIL BOOM. INVESTIGATION REVEALED A FUEL SAMPLE TAKEN FROM THE ENGINE FUEL PUMP FILTER CHAMBER CONTAINED SEVERAL DIFFERENT TYPES OF CONTAMINTATION PARTICLES. SOME OF WHICH WERE FROM A DETERIORATING FUEL PUMP BUSHING.
Flight
Event TypeAccident
Event Time16:30 PST
Nearest Airport0nm
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes 369D
Tail NumberN779FA
Aircraft CategoryHeli
DamageSubstantial
OperatorMichael L Obrien
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C2OB · Turboshaft · 375
Seats5
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 31 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind270° @ 10 kt, gusting 20 kt
Visibility10 sm
CeilingBroken clouds 2000 ft
Temperature / Dew Point39 C / 0 C
Altimeter30.00 inHg
Weather SourcePILO