Accident Overview
On August 13, 2010, at approximately 1120 central daylight time, a Bell 206B helicopter, registration N54BE, was substantially damaged during a landing at the pilot's private helipad in Rocky Mount, Missouri. The pilot, who was the sole occupant, was not injured. The personal flight was conducted under 14 Code of Federal Regulations Part 91 without a flight plan, and visual meteorological conditions prevailed. The helicopter had departed Jefferson City Memorial Airport (JEF) in Jefferson City, Missouri, about 1050.
Pilot Account
The pilot reported that the approach and landing were normal. After landing, he lowered the collective and began to roll off the throttle. However, before the throttle was completely off, the helicopter suddenly rolled to the right. The aircraft came to rest on its right side, resulting in damage to the airframe, main rotor, and tail boom.
Post-Accident Examination
A post-accident examination revealed no anomalies consistent with a pre-impact failure or malfunction. Flight control continuity was confirmed.
Weather Conditions
The pilot reported clear skies with light and variable winds at the time of the accident. Weather recorded at Lee C. Fine Memorial Airport (AIZ), about 14 miles southeast of the accident site, at 1115, included clear skies and winds from the southwest at 8 knots.
Relevant Information
The Federal Aviation Administration (FAA) Rotorcraft Flying Handbook notes that helicopters are susceptible to a lateral rolling tendency referred to as dynamic rollover. The handbook states: 'Dynamic rollover is possible even during takeoff and landings on relatively level ground, if one wheel or skid is on the ground and thrust (lift) is approximately equal to the weight of the helicopter. If the takeoff or landing is not performed properly, a roll rate could develop around the wheel or skid that is on the ground.'