ASN Wikibase Occurrence # 268949
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| Date: | Thursday 23 November 2000 |
| Time: | 09:45 LT |
| Type: |  Bell 206 B3 |
| Owner/operator: | |
| Registration: | N2062D |
| MSN: | 3334 |
| Year of manufacture: | 1981 |
| Total airframe hrs: | 7337 hours |
| Engine model: | Allison 250-C20 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | LAKE KACHESS, Washington -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While conducting long-line operations, the helicopter experienced a sudden loss of engine power and the pilot initiated a forced landing to a nearby road. Post accident examination of the helicopter revealed that the helicopter was not equipped with an engine air induction system deflector kit (snow baffles). The FAA approved Rotorcraft Flight Manual for the helicopter (Limitations Section) states, in part, the following: "The following equipment shall be installed when conducting flight operations in falling and/or blowing snow to reduce the possibility of engine flameout: The Particle Separator Engine Air Induction System Kit and the Deflector Kit." The 0956 METAR observation at Stampede Pass (approximately 4 miles northeast of the accident site; elevation 3,800 feet above mean sea level [MSL]) reported winds from 090 degrees at 5 knots; visibility 1/4 statute mile, heavy snow and freezing fog; broken clouds at 300 feet; overcast at 1,400 feet; temperature dew point 18 degrees F; and temperature 16 degrees F. Post accident inspection of the engine revealed no evidence of a mechanical failure or malfunction.
Probable Cause: The pilot's failure to comply with the flight manual regarding the use of an induction system deflector kit (snow baffles) while operating in snow, and the ingestion of foreign material/snow that resulted in an engine flameout while hovering. A snow baffle deflector kit not being installed and snow are factors contributing to the accident.
Accident investigation:
 |
|
Sources:
NTSB SEA01LA024
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2021 19:36 | ASN Update Bot | Added |
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