Primary finding
Probable cause
the pilot's improper use of the collective control while attempting to free the right skid, which induced a dynamic rollover.
Investigator assessment
Analysis narrative
The helicopter rolled over while hover taxiing into position for a takeoff. The pilot was practicing takeoffs and landings in a dry river bed. Following a landing, the pilot was repositioning the helicopter to the right when the right skid contacted wet sand and dug in. The helicopter began tipping to the right and the pilot responded by applying left cyclic. The pilot told Federal Aviation Administration inspectors that he then made the mistake of increasing the collective in an attempt to clear the obstruction. The helicopter rolled over to the right and sustained substantial damage.
Source record
Factual narrative
This report is based on information received by the National Transportation Safety Board (NTSB). Additional details may be found in the NTSB's public docket for this case. For further information, please contact the NTSB Office of Public Inquiries.