ASN Wikibase Occurrence # 132324
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| Date: | Wednesday 13 July 1988 |
| Time: | 12:30 |
| Type: |  Aérospatiale SA 315B Lama |
| Owner/operator: | Gradney Helicopters, Inc. |
| Registration: | N3128G |
| MSN: | 2488 |
| Total airframe hrs: | 3184 hours |
| Engine model: | TURBOMECA ARTOUSTE IIIB |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Oakridge, OR -
 United States of America
|
| Phase: | En route |
| Nature: | External load operation |
| Departure airport: | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Information is only available from news, social media or unofficial sources |
WHILE SLINGING A LOG THE PILOT ALLOWED THE LOG/SLING LINE TO CONTACT A TREE. THE MOMENTUM OF THE LOG AND HELICOPTER BOWED THE TREE OVER WHEN THE LINE CONTACTED IT. THE PILOT CHOSE TO RELEASE THE LOG FROM THE SLING LINE RATHER THAN DISENGAGE THE ENTIRE LINE AND LOG FROM THE HELICOPTER. ONCE THE LOG SEPARATED, THE LINE CAUGHT IN THE TREE WHICH RETURNED TO AN UPRIGHT ATTITUDE AND PULLED THE LINE TIGHT. THE FORCE APPLIED TO THE HELICOPTER AS THE LINE TIGHTENED, IN TURN ROTATED THE HELICOPTER ABOUT ITS LONGITUDINAL AXIS TO A POINT WHEREBY THE PILOT LOST CONTROL. SHORTLY THEREAFTER THE HELICOPTER DESCENDED INTO THE TREES AND COLLIDED WITH THE TERRAIN.
Sources:
https://app.ntsb.gov/pdfgenerator/ReportGeneratorFile.ashx?EventID=20001213X26393&AKey=1&RType=Final&IType=LA
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=3128G
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 04-Mar-2018 11:52 | Bowzo | Updated [Source, Damage, Narrative] |
| 04-Mar-2018 11:53 | harro | Updated [Source, Narrative] |
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