Summary
On March 30, 2009, a Robinson Helicopter R22 BETA (N74815) was involved in an incident near Chandler, AZ. All 2 people aboard were uninjured. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this incident to be: The certified flight instructor's inadequate supervision of the student pilot during a hover demonstration and his subsequent loss of helicopter control that resulted in a dynamic rollover.
The purpose of the flight was for the certified flight instructor (CFI) to demonstrate the helicopter to a prospective student who had no prior helicopter flying experience. They had just performed an hour of uneventful flight, and decided to practice hover maneuvers over a turf area adjacent to the airport helipad. The CFI briefed the student on the sensitivity of the helicopter controls during a hover, and then passed over control. The student unsuccessfully attempted to perform a hover, and the CFI then regained control. He elected to let the student try to hover again, and as he relinquished control, the helicopter rolled to the left. The CFI attempted to correct the deviation; however, during recovery the low rotor rpm warning horn sounded.
This incident is documented in NTSB report WPR09CA173. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N74815.
Accident Details
Probable Cause and Findings
The certified flight instructor's inadequate supervision of the student pilot during a hover demonstration and his subsequent loss of helicopter control that resulted in a dynamic rollover.
Aircraft Information
Registered Owner (Current)
Analysis
The purpose of the flight was for the certified flight instructor (CFI) to demonstrate the helicopter to a prospective student who had no prior helicopter flying experience. They had just performed an hour of uneventful flight, and decided to practice hover maneuvers over a turf area adjacent to the airport helipad. The CFI briefed the student on the sensitivity of the helicopter controls during a hover, and then passed over control. The student unsuccessfully attempted to perform a hover, and the CFI then regained control. He elected to let the student try to hover again, and as he relinquished control, the helicopter rolled to the left. The CFI attempted to correct the deviation; however, during recovery the low rotor rpm warning horn sounded. He increased the throttle, but the skid made contact with the ground and the helicopter rolled onto its side. The helicopter sustained substantial damage to the rotor system and gearbox during the accident sequence.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# WPR09CA173