ASN Wikibase Occurrence # 285700
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| Date: | Friday 15 August 2008 |
| Time: | 06:00 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | Triple H Aviation Inc |
| Registration: | N945HA |
| MSN: | 2057 |
| Engine model: | Lycoming VO-540 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cokato, Minnesota -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Cokato, MN |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported he made three passes over the fields that he was going to spray. He stated he noticed a power line pole that had a transformer cover on it and what appeared to be a wire covering running up the pole. This led the pilot to believe that the power lines in the area were buried. The pilot then landed and loaded the chemicals. He stated that after taking off with the load, he flew one more pass to look for power lines and still did not see any. He stated that during the first swath run, the helicopter contacted power lines. The helicopter initially pitched nose up and to the right. The pilot stated he pushed the nose down and to the left, but the power lines wrapped around the control tubes and tail rotor. The helicopter then entered a descending spin. The pilot stated he pulled back to flatten the descent just prior to the helicopter contacting the ground.
Probable Cause: The pilot did not visually identify and maintain clearance with the power lines, and the pilot's inability to maintain control of the helicopter once it contacted the power lines. Factors associated with the accident were the low altitude operations being conducted and the power lines.
Accident investigation:
 |
|
Sources:
NTSB CHI08CA252
History of this aircraft
Other occurrences involving this aircraft
| 2 April 1974 | ZK-HEZ | Helispray (NZ) Ltd | 0 | Tarawera Forest, Bay of Plenty 3 |  |
unk |
| 3 October 1978 | ZK-HEZ | James Aviation Ltd | Kereru, Hawke's Bay | |
unk |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Oct-2022 13:46 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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