ASN Wikibase Occurrence # 43687
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| Date: | Saturday 8 September 2007 |
| Time: | 15:05 |
| Type: |  Hughes 369D |
| Owner/operator: | Northwest Helicopters, Inc. |
| Registration: | N31HM |
| MSN: | 1160027D |
| Year of manufacture: | 1977 |
| Total airframe hrs: | 5874 hours |
| Engine model: | Allison 250/C2DB |
| Fatalities: | Fatalities: 1 / Occupants: 3 |
| Aircraft damage: | None |
| Category: | Accident |
| Location: | Ellensburg, WA -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Unknown |
| Departure airport: | Puyallup, WA |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Prior to the accident, the pilot and the second passenger (a biologist) had flown on numerous missions over the course of more than 20 years. The day of the accident, the flight departed early in the morning for the purpose of relocating bighorn sheep. During the flight, the front left-seated pilot was maneuvering the helicopter, allowing both the gunner (aft left seat) and mugger (aft right seat) to capture the sheep. After capturing 16 sheep, the mission continued toward the achievement of the 20 sheep goal for that day. The crew gunned two sheep in one net, and the pilot maneuvered the helicopter onto the hillside (about a 30-percent grade). He continued toe-ing the helicopter into the hillside with the front skids in contact with terrain and the netted sheep off the right side of the helicopter. The gunner egressed the left side and walked into the rotating main rotor disc, killing himself. The pilot opined that the gunner may have been feeling added pressure and fatigue on the capture. A review of the operator's employee manual disclosed that the operations on the accident flight were in compliance with the manual. However, the manual did not address passenger briefing of egress instructions on a regular basis.
Probable Cause: The passenger's inadequate visual lookout and failure to maintain clearance from the rotating main rotor disc while the helicopter was hovering. An uphill terrain condition was a factor
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20070919X01416&key=1
History of this aircraft
Other occurrences involving this aircraft
| 29 July 2013 | N31HM | Dah Aircraft Llc | 0 | near Center Point, Wetzel County, WV | |
sub |
| Collision with pole or wires | ||||||
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Oct-2008 00:45 | ASN archive | Added |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 04-Dec-2017 18:55 | ASN Update Bot | Updated [Operator, Total occupants, Other fatalities, Nature, Source, Narrative] |
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