Summary
On March 12, 2004, a Robinson R22 (N4370D) was involved in an incident near Keystone, FL. 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 inadequate supervision by the flight instructor by allowing the student to lose excessive altitude resulting in a skid impacting the ground and subsequent roll over of the helicopter.
On March 12, 2004, about 0930 eastern standard time, a Robinson R22, N4370D, registered to and operated by Collective Helicopters Corporation, as a Title 14 CFR Part 91 instructional flight, rolled over while practicing maneuvers at the Keystone Airpark, Keystone Heights, Florida. Visual meteorological conditions prevailed and no flight plan was filed. The instructor-rated pilot and student pilot received no injuries, and the helicopter incurred substantial damage. The flight originated from Keystone Airpark, Florida earlier that day.
The certified flight instructor stated that he had his student complete several steep turn maneuvers earlier in the practice session and decided to let him perform one more before returning back to the hangar.
This incident is documented in NTSB report MIA04CA059. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N4370D.
Accident Details
Probable Cause and Findings
The inadequate supervision by the flight instructor by allowing the student to lose excessive altitude resulting in a skid impacting the ground and subsequent roll over of the helicopter.
Aircraft Information
Registered Owner (Historical)
Analysis
On March 12, 2004, about 0930 eastern standard time, a Robinson R22, N4370D, registered to and operated by Collective Helicopters Corporation, as a Title 14 CFR Part 91 instructional flight, rolled over while practicing maneuvers at the Keystone Airpark, Keystone Heights, Florida. Visual meteorological conditions prevailed and no flight plan was filed. The instructor-rated pilot and student pilot received no injuries, and the helicopter incurred substantial damage. The flight originated from Keystone Airpark, Florida earlier that day.
The certified flight instructor stated that he had his student complete several steep turn maneuvers earlier in the practice session and decided to let him perform one more before returning back to the hangar. On the last steep turn the student lost more altitude then on previous maneuvers. According to the instructor he took over the controls; however, the helicopter touched down right skid lower than the left with forward left lateral movement resulting in the helicopter rolling over on to the ground. The flight instructor stated there were no mechanical failures or malfunctions to the helicopter or any of its systems prior to the accident.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# MIA04CA059