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ASN Wikibase Occurrence # 30255
Last updated: 15 August 2018
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Type:Silhouette image of generic R44 model; specific model in this crash may look slightly different
Robinson R44
Registration: N999EV
C/n / msn: 0667
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Palo Alto, California -   United States of America
Phase: Approach
Departure airport:San Carlos, CA (SQL)
Destination airport:Palo Alto, CA (PAO)
Investigating agency: NTSB
The pilot and passenger were inbound to land and the pilot requested permission to perform an autorotation, which was approved. The pilot reported that he did not think he was going to reach the runway during the autorotation so he added power. The engine failed to respond and the tail stinger contacted the ground resulting in the separation of the tail boom. The pilot pulled collective pitch; the helicopter briefly became airborne, and spun violently to the right. The pilot maintained a level attitude and the helicopter landed hard. After the rotor stopped, they exited the helicopter. The pilot stated that he should have used carburetor heat prior to the extended engine idle period of the autorotation. The temperature and dew point were in the serious icing-glide power range.
Probable Cause: The pilot's failure to use carburetor heat, resulting in a loss of engine power, and, his misjudged autorotation approach that resulted in a collision with the ground during the landing flare. Contributing to the accident was the conditions conducive to carburetor icing.


FAA register: 2. FAA:

Revision history:

27-Sep-2008 01:00 ASN archive Added
17-Dec-2011 22:56 Dr. John Smith Updated [Time, Operator, Total fatalities, Total occupants, Other fatalities, Location, Country, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative]
19-Aug-2016 18:48 Dr.John Smith Updated [Departure airport, Destination airport, Source, Narrative]
12-Dec-2017 18:25 ASN Update Bot Updated [Time, Operator, Departure airport, Destination airport, Source, Damage, Narrative]

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