ASN Wikibase Occurrence # 30424
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| Date: | Monday 6 September 1999 |
| Time: | 08:30 LT |
| Type: |  Bell UH-1H |
| Owner/operator: | High Country Helicopters, Inc. |
| Registration: | N4085L |
| MSN: | 68-15655 |
| Year of manufacture: | 1968 |
| Total airframe hrs: | 3854 hours |
| Engine model: | Lycoming T53-L-13 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Silverton, CO -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | (NONE) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
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.
Accident investigation:
 |
|
Sources:
NTSB DEN99LA160
History of this aircraft
Other occurrences involving this aircraft
| 6 June 2019 | N4085L | Yukon Helicopters Inc | 0 | Bethel, AK | |
sub |
| Fuel exhaustion | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Sep-2008 01:00 | ASN archive | Added |
| 28-Oct-2017 16:01 | TB | Updated [Total fatalities, Total occupants, 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] |
| 07-Apr-2024 18:06 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Source, Narrative, Category, Accident report] |
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