ASN Wikibase Occurrence # 177710
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| Date: | Sunday 23 May 2004 |
| Time: | 14:15 |
| Type: |  Bell 206B |
| Owner/operator: | Private |
| Registration: | N206AF |
| MSN: | 2473 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 1928 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 5 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Auburn, WA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Bow, WA |
| Enumclaw, WA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that while in cruise flight at about 900 to 1,000 feet above ground level, 95 knots, and 80% torque, without warning, the helicopter suddenly lost altitude and yawed violently to the left and rapidly rolled (pilot unsure as to which direction). The pilot initiated an autorotation to a field, maneuvering to avoid trees. The pilot stated that during the flare, he pulled in collective, and the helicopter yawed, so he "rolled off the throttle." The helicopter touched down with almost no forward speed, the right landing skid collapsed and rolled over onto its right side. The pilot stated that he did not recall hearing the engine out beeper or the low rotor RPM horn and he did not note the engine or rotor RPM indications during the descent. Post accident inspection of the airframe and subsequent inspection and teardown of the engine and associated components did not find evidence of a mechanical failure or malfunction.
Probable Cause: Loss of control for undetermined reasons.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20040528X00686&key=1
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 11-Jul-2015 13:38 | Noro | Added |
| 21-Dec-2016 19:30 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Dec-2017 17:58 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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