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ASN Wikibase Occurrence # 42716
Last updated: 15 August 2021
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Date:10-AUG-1999
Time:17:30
Type:Silhouette image of generic B06 model; specific model in this crash may look slightly different
Bell 206B JetRanger
Owner/operator:Rapid Helicopters Incorporated
Registration: N67JJ
MSN: 4062
Fatalities:Fatalities: 2 / Occupants: 5
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:Custer State Park, South Dakota -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Unknown
Departure airport:
Destination airport:
Investigating agency: NTSB
Narrative:
The helicopter impacted trees and terrain while maneuvering during a sightseeing flight over a national park. The helicopter was in a descending left turn and a high angle of bank with decreasing main rotor rpm. A low rpm warning horn was heard several seconds prior to impact with the trees. An acoustical analysis of a video tape taken by a passenger shows a decrease in the engine gear box and planetary speeds along with a steady state engine speed several seconds prior to the end of the video tape. The end of the video tape recorded the initial impact with the trees. Examination of the engine and airframe revealed no anomalies.

Probable Cause: The pilot's failure to maintain adequate altitude/clearance from the trees. Contributing to the accident was the pilot's inadvertent settling with power.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X19426&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=67JJ


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
12-Apr-2015 14:17 Dr. John Smith Updated [Time, Location, Nature, Departure airport, Source, Narrative]
21-Dec-2016 19:24 ASN Update Bot Updated [Time, Damage, Category, Investigating agency]
14-Dec-2017 08:46 ASN Update Bot Updated [Nature, Departure airport, Source, Narrative]

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