ASN Wikibase Occurrence # 215349
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| Date: | Tuesday 30 August 2011 |
| Time: | 11:30 |
| Type: |  Robinson R22 Beta II |
| Owner/operator: | Bering Pacific Ranches Ltd |
| Registration: | N169CW |
| MSN: | 3002 |
| Year of manufacture: | 1999 |
| Engine model: | Lycoming O&VO-360 SER |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Location: | Chernofski Harbor, 60 miles SW of Unalaska, AK -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Unalaska-Tom Madsen Airport, AK (DUT/PADU) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On August 30, 2011, about 13:30 ADT (Alaska Daylight Time), a Robinson R22 Beta II helicopter, N169CW, sustained substantial damage following a loss of engine power and subsequent emergency landing into water at Chernofski Harbour, Station Bay, approximately 60 miles southwest of Unalaska, Alaska (at approximate Coordinates: 53°24'22"N, 167°31'8"W). The helicopter was registered to Bering Pacific Ranches, Ltd, and operated by the pilot as a personal flight under the provisions of 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed for the flight, and no flight plan was filed. The flight originated from the Unalaska Airport, Unalaska, Alaska, about 12:30 ADT.
The pilot reported that approximately 9 miles from his destination, the engine ran rough for about three engine revolutions before losing total power. He entered an emergency auto rotation, and landed the helicopter in a shallow bay, approximately 150 feet from the shoreline. After contacting the water, the helicopter rolled to the right, and sank in shallow water. The pilot reported substantial damage to the tail rotor drive system.
A Federal Aviation Administration inspector travelled to the operator's hangar, and examined the helicopter. No mechanical anomalies were noted that would have precluded normal operation. The operator stated that the helicopter was going to be sent to a facility for a more detailed inspection.
At 13:58 PDT, the nearest weather reporting facility to the accident site was reporting the temperature as 14 degrees Celsius, and the dew point as 9 degrees Celsius. According to a carburettor icing probability chart, serious icing conditions existed at cruise and glide power settings.
The National Transportation Safety Board determines the probable cause(s) of this accident as follows: A loss of engine power in cruise flight for undetermined reasons.
Accident investigation:
 |
|
Sources:
1. NTSB Identification: ANC11LA099 at https://ntsb.gov/investigations/_layouts/ntsb.aviation/brief2.aspx?ev_id=20110909X31747&ntsbno=ANC11LA099&akey=1
2. FAA Registration: https://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N169CW
3. http://helihub.com/2011/08/30/30-aug-11-n169cw-robinson-r22-unalaska-us-alaska/
4. http://helicoptersafety.blogspot.com/2011/09/30-aug-11-n169cw-robinson-r22-unalaska.html
5. Photo of wreckage: http://www.airport-data.com/aircraft/photo/000698708.html
6. Photo of wreckage: http://www.airport-data.com/aircraft/photo/000698460.html
7. http://wikimapia.org/6966644/Port-of-Chernofski-Harbor
8. https://en.wikipedia.org/wiki/Unalaska_Airport
History of this aircraft
Other occurrences involving this aircraft
| 14 July 2000 | N169CW | Group Three Aviation | 0 | LAKE PIRU, California | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 13-Sep-2018 21:33 | Dr.John Smith | Added |
| 13-Sep-2018 21:35 | Dr.John Smith | Updated [Source] |
| 15-Sep-2023 07:57 | Ron Averes | Updated [[Source]] |
Corrections or additions? ... Edit this accident description
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