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ASN Wikibase Occurrence # 22710
Last updated: 22 September 2021
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Date:09-AUG-1994
Time:12:30
Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206B JetRanger
Owner/operator:Private
Registration: N4604Y
MSN: 556
Fatalities:Fatalities: 0 / Occupants: 5
Other fatalities:0
Aircraft damage: Substantial
Category:Accident
Location:Chuit River, near Tyonek, Alaksa -   United States of America
Phase: Landing
Nature:Agricultural
Departure airport:Anchorage, AK (ANC/PANC)
Destination airport:Chuit River, near Tyonek, Alaksa
Investigating agency: NTSB
Narrative:
On August 9, 1994, at 1230 Alaska daylight time, a skid equipped Bell 206B helicopter, registered to and operated by the pilot, crashed into the Chuit River. On landing on a gravel bar in the Chuit River, the area where the helicopter touched down was not level so the pilot elected to return to the hover and re*position to a better site. However, immediately after getting airborne again, the helicopter began to turn to the right. The pilot applied left pedal and reported that he could feel the helicopter responding but before control was regained it struck the water. The helicopter came to rest upright and the pilot and passengers were able to escape before it rolled over and sank.

According to the manufacturer and the FAA, when a helicopter is operating at or near its maximum gross weight, tail rotor control may become marginal depending on wind conditions. Hovering with a tailwind may cause temporary loss of tail rotor effectiveness and allow the helicopter to rotate about its vertical axis.

The NTSB determined the cause to be: The pilot's failure to maintain tail rotor effectiveness during hover

Sources:

1. NTSB Identification: ANC94LA103 at https://www.ntsb.gov/_layouts/ntsb.aviation/brief2.aspx?ev_id=20001206X01908&ntsbno=ANC94LA103&akey=1_
2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=4604Y


Revision history:

Date/timeContributorUpdates
07-Sep-2008 10:48 Vaclav Kudela Added
30-May-2016 12:58 Dr.John Smith Updated [Time, Total fatalities, Total occupants, Other fatalities, Location, Nature, Departure airport, Destination airport, Source, Narrative]
21-Dec-2016 19:14 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
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]

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