ASN Wikibase Occurrence # 289518
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| Date: | Saturday 26 February 2011 |
| Time: | 10:00 LT |
| Type: |  Hiller UH-12E |
| Owner/operator: | |
| Registration: | N236HA |
| MSN: | HA3063 |
| Total airframe hrs: | 7224 hours |
| Engine model: | Lycoming VO-540 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Colusa, California -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Private |
| Departure airport: | Colusa, CA |
| Colusa, CA | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he and the owner of the helicopter were flying a reconnaissance flight in preparation for a possible frost control flight the following morning. They were attempting to identify potential obstacles in the area. As they were flying slowly over the north edge of an almond orchard he initiated a descent, and slowed the helicopter to just above effective translational lift. He turned southbound and noted a 7- to 10-mile-per-hour tailwind. He reported that the tailwind, coupled with the descent, caused the helicopter to enter a settling with power condition. He stated that due to the close proximity of the trees he was not able to perform a normal recovery of lowering the collective and applying forward cyclic control. The helicopter descended between a row of trees and the main rotor blades struck the trees. The pilot stated that there were no mechanical malfunctions with the helicopter before the accident.
Probable Cause: The pilot's failure to maintain an adequate airspeed and an inadvertent encounter with settling with power while flying downwind.
Accident investigation:
 |
|
Sources:
NTSB WPR11CA146
History of this aircraft
Other occurrences involving this aircraft
| 1 September 1987 | N236HA | San Tan Dusters Inc. | 0 | Scottsdale, AZ | |
w/o |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Oct-2022 14:47 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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