Incident Overview
A helicopter with a pilot holding 5,600 hours of flight experience encountered an unexpected control issue during cruise flight. According to the pilot's report, while flying at an altitude of 500 feet above ground level and an airspeed of 90 knots, the helicopter made an uncontrolled yaw of 40 degrees to the right. This uncommanded movement was followed by a shutter and vibration felt throughout the fuselage and tail section.
Precautionary Landing
In response to the abnormal behavior, the pilot decided to conduct a precautionary landing on a nearby highway. The maneuver was executed with the intent to safely bring the helicopter to the ground without further incident.
Hard Landing and Bounce
During the flare and touchdown, the helicopter sustained a hard landing. The initial contact with the road surface caused the helicopter to bounce back into the air. After the bounce, the helicopter settled and came to rest on the edge of the road.
Post-Incident Inspection
A Federal Aviation Administration (FAA) inspector subsequently examined the helicopter. During a follow-up interview, the pilot reiterated the sequence of events, emphasizing the unexpected yaw, vibration, and the subsequent hard landing with a bounce.
No further details regarding the helicopter's condition or any injuries were provided in the source material.