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ASN Wikibase Occurrence # 30424
Last updated: 25 February 2018
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Date:06-SEP-1999
Time:08:30
Type:Silhouette image of generic UH1 model; specific model in this crash may look slightly different
Bell UH-1H
Owner/operator:High Country Helicopters, Inc.
Registration: N4085L
C/n / msn: 68-15655
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Airplane damage: Substantial
Category:Accident
Location:near Silverton, CO -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:OWRK
Departure airport:NONE
Destination airport:
Investigating agency: NTSB
Narrative:
The pilot said this was his first trip of the morning, and he was transporting approximately 300 pounds of construction materials. He said that the load was on the ground and he was hovering while ground personnel disconnected the cargo net. He said that one of the ground team radioed him and reported that 'fire and smoke was coming from your tail pipe.' The pilot said that he noticed that the rotor rpm warning light was on, and the engine out lights and horns had been activated. He lowered the collective and autorotated to the ground, but the main rotors impacted terrain. The aircraft records indicate that the engine came from a civilian overhaul facility, and was installed in N4085L approximately 21 hours prior to the accident. The Colorado Department of Minerals and Mines reported the mine entrance elevation was 11,500 feet. The density altitude was calculated to be 13,000 feet.

Probable Cause: The total loss of engine power for undetermined reasons. A factor was the lack of suitable terrain for a forced landing.

Sources:

NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20001212X19738&key=1


Revision history:

Date/timeContributorUpdates
27-Sep-2008 01:00 ASN archive Added
28-Oct-2017 16:01 TB Updated [Total occupants, Total fatalities, Other fatalities, Location, Country, Phase, Nature, Source, Damage, Narrative]
14-Dec-2017 09:03 ASN Update Bot Updated [Time, Cn, Operator, Nature, Departure airport, Source, Narrative]

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