ASN Wikibase Occurrence # 380874
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| Date: | Monday 12 September 1983 |
| Time: | 10:20 LT |
| Type: |  Hughes 369D |
| Owner/operator: | Rocky Mountain Helicopters |
| Registration: | N8667F |
| MSN: | 280 |
| Total airframe hrs: | 3551 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Woodruff, UT -
 United States of America
|
| Phase: | Taxi |
| Nature: | Executive |
| Departure airport: | Woodruff, UT |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER WAS BEING USED TO LIFT SEISMIC MATERIALS ON A 100 FT LONG LINE. AFTER LIFTING THE LOAD TO A HOVER AT ABOUT 10 TO 20 FT, THE PLT HEARD A LOUD 'BANG' WHICH WAS FOLLOWED BY A LOSS OF DIRECTIONAL CONTROL. THE HELICOPTER BEGAN UNCONTROLLED SPINNING & CRASHED MOMENTS LATER. WITNESSES REPORTED THAT THE TAIL ROTOR BLADES STOPPED ROTATING PRIOR TO THE HELICOPTER HITING THE GROUND. AN EXAM REVEALED THAT THE AFT TAIL ROTOR DRIVESHAFT FLEXIBLE COUPLING, BENDIX PN; 369A5501, HAD FAILED. DUE TO DAMAGE OF THE FRACTURE SURFACE, THE MODE OF FAILURE COULD NOT BE DETERMINED.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB DEN83FA215
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Apr-2024 21:26 | ASN Update Bot | Added |
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