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ASN Wikibase Occurrence # 30121
Last updated: 23 October 2021
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Type:Silhouette image of generic S61R model; specific model in this crash may look slightly different
Sikorsky HH-3F (S-61R)
Owner/operator:Cinema Aircraft Restorations L
Registration: N500XL
MSN: 1472
Fatalities:Fatalities: 0 / Occupants: 2
Other fatalities:0
Aircraft damage: Substantial
Location:Wellington, NV -   United States of America
Phase: En route
Departure airport:Minden, NV (MEV)
Destination airport:Lake Havasu, AZ (HII)
Investigating agency: NTSB
The helicopter collided with trees when it made a forced landing under power. The helicopter was low and climbing over a ridge in mountainous terrain when it encountered wind shear and could not sustain flight. The pilot noticed a rapid airspeed fluctuation from 80 knots to 20 knots. He completed a systems check and saw the airspeed go to zero. The helicopter rapidly settled. The pilot lowered the collective, but the rpm began to seriously decay. He tried to regain rpm, but was unsuccessful. The helicopter continued to settle downhill into a canyon. The helicopter collided with trees at zero airspeed and 800-feet-per-minute rate of descent in the bottom of the canyon.
Probable Cause: the pilot's encounter with a wind shear while maneuvering at low altitude in mountainous terrain, which resulted in a high descent rate and inadvertent entry into a power settling condition.




Revision history:

27-Sep-2008 01:00 ASN archive Added
31-Dec-2009 11:20 TB Updated [Time, Aircraft type, Cn, Operator, Phase, Nature, Departure airport, Destination airport, Source, Damage, Narrative]
21-Dec-2016 19:16 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
21-Dec-2016 19:20 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
12-Dec-2017 18:51 ASN Update Bot Updated [Cn, Operator, Departure airport, Destination airport, Source, Narrative]

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