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ASN Wikibase Occurrence # 134847
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Type:Silhouette image of generic EXEC model; specific model in this crash may look slightly different
RotorWay Exec 90
Registration: N4359N
MSN: 5042
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Weston, WV -   United States of America
Phase: Unknown
Departure airport:Horner, WV
Destination airport:
Investigating agency: NTSB
The pilot began an autorotation maneuver at 800 feet above ground level (agl), and upon reaching 100 feet agl began to flare the helicopter. When the helicopter's forward speed had reduced to almost zero, the pilot leveled its pitch attitude, and applied full throttle and right anti-torque pedal. The helicopter turned to the right, and due to a perceived lack of torque, the pilot believed that the engine had experienced a loss of power. He applied left anti-torque pedal to straighten the helicopter, and decreased the collective pitch in order to increase rotor rpm. He then increased the collective pitch to cushion the landing, but the helicopter impacted the ground hard and the skids collapsed outward. A post crash fire ensued and consumed nearly the entire helicopter. When asked, the pilot could not recall any engine or rotor instrument indications during the autorotation, and could not recall if the engine was running when the helicopter impacted the ground. Examination of the wreckage revealed no anomalies with the engine or the airframe.
Probable Cause: A loss of engine power for undetermined reasons during an attempted power recovery. A factor in the accident was the pilot's failure to maintain rotor rpm, which resulted in a hard landing and subsequent post crash fire.




Revision history:

21-Dec-2016 19:26 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
06-Dec-2017 10:44 ASN Update Bot Updated [Operator, Other fatalities, Departure airport, Source, Narrative]

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