ASN Wikibase Occurrence # 39404
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| Date: | Monday 3 June 1996 |
| Time: | 16:00 LT |
| Type: |  Robinson R22 Mariner |
| Owner/operator: | Bearing Sea Reindeer Products |
| Registration: | N113CF |
| MSN: | 1428M |
| Year of manufacture: | 1990 |
| Total airframe hrs: | 1094 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | 32 miles southeast of Mekoryuk, Nunivak Island, Alaska -
 United States of America
|
| Phase: | Unknown |
| Nature: | Executive |
| Departure airport: | , AK (KMYU) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot had departed to pick up a company worker about 35 miles south of the departure point on a remote island. The wreckage was located the following day, partially submerged and floating in a small lake. The helicopter received damage consistent with a significant vertical descent onto the lake. The rotor system was undamaged. The wreckage examination revealed particulate contamination in the fuel system. The helicopter was routinely fueled from barrels and hand pumped through a water/separator type filter. Examination of the water separator revealed water and sediment in the filter bowl. A sample of fuel from the fuel barrel contained particulate contamination. Following the accident, the engine was removed and placed in a test stand where it was started. The engine produced full power until the left magneto failed internally due to corrosion from water immersion.
Probable Cause: A loss of engine power due to fuel contamination found in the fuel supply and helicopter fuel system. Factors in the accident were the pilot's inadequate filtration (servicing of the helicopter) of the fuel supply, and the pilot's inadequate performance of emergency procedures.
Accident investigation:
 |
|
Sources:
NTSB ANC96FA081
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=113CF
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 22-Sep-2016 16:33 | Dr.John Smith | Updated [Time, Location, Phase, Departure airport, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Apr-2024 06:38 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
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