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NTSB Report
March 2, 1982 · Hughes 500 · N8690F
Little Valley, NY
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 2, 1982
Injury Outcomes
No injuries (4 uninjured)
Location
Little Valley, NY
Aircraft
Hughes 500
Tail Number
N8690F
Operator
Evirogas
Injuries
None
Aircraft Damage
Substantial
NTSB Number
NYC82DFJ11
ABOUT 10 MINUTES AFTER TAKEOFF IN HEAVY, WET, BLOWING SNOW, THE ENGINE LOST POWER. AT THAT TIME, THE HELICOPTER WAS AT ABOUT 100 FT AGL. AT THE FIRST INDICATION OF A POWER LOSS, THE PILOT INITIATED AND COMPLETED AN AUTOROTATIVE LANDING IN AN OPEN FIELD. DURING TOUCHDOWN, THE MAIN ROTOR BLADES FLEXED DOWNWARD AND STRUCK THE TAIL BOOM. THE AUTO REIGNITION FUNCTIONED AND THE ENGINE WAS OPERATING AT THE TIME OF LANDING. AN INVESTIGATION REVEALED THE PARTICLE SEPARATOR HAD BECOME COMPLETELY CLOGGED WITH SNOW. THE PILOT DID NOT RECEIVE ADVANCE WARNING FROM THE PARTICLE SEPARATOR DIFFERENTIAL PRESSURE SENSOR AND COCKPIT WARNING LIGHT SYSTEM. THEREFORE, HE DID NOT MANUALLY RELEASE THE PARTICLE SEPARATOR BYPASS DOOR PRIOR TO THE ENGINE FLAME-OUT.
Full Narrative
ABOUT 10 MINUTES AFTER TAKEOFF IN HEAVY, WET, BLOWING SNOW, THE ENGINE LOST POWER. AT THAT TIME, THE HELICOPTER WAS AT ABOUT 100 FT AGL. AT THE FIRST INDICATION OF A POWER LOSS, THE PILOT INITIATED AND COMPLETED AN AUTOROTATIVE LANDING IN AN OPEN FIELD. DURING TOUCHDOWN, THE MAIN ROTOR BLADES FLEXED DOWNWARD AND STRUCK THE TAIL BOOM. THE AUTO REIGNITION FUNCTIONED AND THE ENGINE WAS OPERATING AT THE TIME OF LANDING. AN INVESTIGATION REVEALED THE PARTICLE SEPARATOR HAD BECOME COMPLETELY CLOGGED WITH SNOW. THE PILOT DID NOT RECEIVE ADVANCE WARNING FROM THE PARTICLE SEPARATOR DIFFERENTIAL PRESSURE SENSOR AND COCKPIT WARNING LIGHT SYSTEM. THEREFORE, HE DID NOT MANUALLY RELEASE THE PARTICLE SEPARATOR BYPASS DOOR PRIOR TO THE ENGINE FLAME-OUT.
Flight
Event TypeAccident
Event Time11:05 EST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes 500
Tail NumberN8690F
Aircraft CategoryHeli
DamageSubstantial
OperatorEvirogas
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20B · Turboshaft · 375
Seats5
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 42 · Second Class
Conditions
ConditionsIMC
LightDaylight
WindCalm
CeilingOvercast 400 ft
Temperature / Dew Point0 C
Altimeter30.00 inHg
Observation Time10:45