What happened
The incident occurred while the helicopter was hovering in a grassy area adjacent to a hangar facility. During this phase of flight, the pilot experienced a sudden and complete loss of flight control. Unable to maintain stability or maneuver the aircraft, the helicopter descended rapidly and struck the ground. The impact resulted in substantial damage to the airframe.
The investigation
Following the accident, investigators conducted a thorough examination of the helicopter's components to determine the root cause of the failure. The inspection focused on identifying any potential system malfunctions or mechanical failures that could have contributed to the loss of control. However, the examination failed to disclose any evidence of pre-existing system malfunctions or component failures.
Findings
To further understand the nature of the damage, a fracture face examination was performed on the broken flight control components. The analysis revealed that the fractures were consistent with overstress failures rather than fatigue or manufacturing defects. This finding suggests that the components failed due to loads exceeding their design limits during the event, rather than failing prior to the incident. No other contributing factors were identified in the source documentation.