ASN Wikibase Occurrence # 285754
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| Date: | Tuesday 5 August 2008 |
| Time: | 10:15 LT |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Strategic Air, LLC. |
| Registration: | N57UP |
| MSN: | 2449 |
| Year of manufacture: | 1994 |
| Total airframe hrs: | 3530 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Buffalo, North Dakota -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Buffalo, ND |
| Buffalo, ND | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that after passing over power lines, he performed a steep descent toward the field he was spraying. The helicopter had a "high descent rate and excessive nose down attitude" during the spray run entry. The pilot was unable to arrest the descent before the main rotor speed dropped below a safe operating speed. A run-on landing was made in the field at about 30 mph, but the helicopter pitched forward and the main rotor impacted terrain. The main rotor, tailboom, fuselage, and landing skids were damaged. The pilot reported that the accident could have been prevented if he had performed a "less aggressive spray run entry."
Probable Cause: The pilot's excessive descent rate and his failure to maintain clearance from terrain during the spray run entry.
Accident investigation:
 |
|
Sources:
NTSB CHI08CA238
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 02-Oct-2022 14:31 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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