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| Date: | Tuesday 5 July 1983 |
| Time: | 08:00 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | Bonanza Valley Aviation |
| Registration: | N4028K |
| MSN: | 5069 |
| Total airframe hrs: | 545 hours |
| Engine model: | Allison 250-C20B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Brooten, MN -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Agricultural |
| Departure airport: | Brooten, MN |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE HELICOPTER HAD JUST LIFTED OFF OF THE FLATBED OF A TRUCK WHEN IT STARTED TO SPIN. THE PLT LOWERED THE COLLECTIVE, REDUCED THE POWER & LANDED BESIDE THE TRUCK. DURING TOUCHDOWN, THE MAIN ROTOR BLADES STRUCK THE TRUCK. AN INVESTIGATION REVEALED THAT THE THRUST BEARING, PN 25200-3, IN THE TAIL ROTOR DRIVE WAS INSTALLED BACKWARDS. THIS ALLOWED THE BEVELED DRIVE GEAR TO MOVE FORWARD & BECOME DISENGAGED FROM THE TAIL ROTOR DRIVE GEAR.
Probable Cause:
Accident investigation:
 |
|
Sources:
NTSB CHI83LA297
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Apr-2024 04:17 | ASN Update Bot | Added |
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