Robinson R22 Beta
Buffalo, ND — August 5, 2008
Event Information
| Date | August 5, 2008 |
| Event Type | ACC |
| NTSB Number | CHI08CA238 |
| Event ID | 20080826X01322 |
| Location | Buffalo, ND |
| Country | USA |
| Coordinates | 46.92639, -97.53528 |
| Highest Injury | NONE |
Aircraft
| Make | Robinson |
| Model | R22 Beta |
| Category | HELI |
| FAR Part | 137 |
| Aircraft Damage | SUBS |
Conditions
| Light Condition | DAYL |
| Weather | VMC |
Injuries
| Fatal | 0 |
| Serious | 0 |
| Minor | 0 |
| None | 1 |
| Total Injured | 0 |
Event Location
Probable Cause
The pilot's excessive descent rate and his failure to maintain clearance from terrain during the spray run entry.
Full Narrative
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."
About This NTSB Record
This aviation event was investigated by the National Transportation Safety Board (NTSB). NTSB investigates all U.S. civil aviation accidents to determine probable cause and issue safety recommendations to prevent future accidents.