Probable cause
The airframe vibration for an undetermined reason.
NTSB analysis
The pilot reported that he had departed the airport and had flown about 8 miles when the helicopter's cyclic began to shake violently during cruise flight. When he attempted to land, he could not get the helicopter to hover so he attempted a run-on landing. The pilot reported that the helicopter's skid caught some high grass or rough terrain and then the helicopter rolled on its side. The pilot reported that the helicopter was operating normally prior to the accident. The inspection of the helicopter revealed no preexisting anomalies.
Text from the NTSB. Open the NTSB docket for CHI08LA151 for the full record.
Event
- Date
- Jun 1, 2008
- Type
- Accident
- Place
- Carrollton, Ohio
- Highest injury
- None
- Weather
- Visual (VMC)
- Light
- Day
Bell 47D1
- N-number
- N74898
- Category
- Helicopter
- Damage
- Substantial
- Operating rule
- Part 91 (general aviation)
- Purpose of flight
- Personal
From the NTSB aviation accident database: N-registered aircraft, events since 2008, data through Oct 28, 2026. The file is published monthly, so the latest weeks are incomplete and recent records can change. The official source is the NTSB aviation investigation search. CheckAero is independent and not affiliated with the NTSB.