Incident Overview
During a training flight, a helicopter was cruising at approximately 1,000 feet above the terrain with an instructor and student on board. According to the instructor, the engine began to miss, inducing a violent yaw. In response, the instructor immediately closed the throttle and lowered the collective, initiating an autorotation.
Autorotation and Obstacle Strike
The autorotation was performed into a yard near a house. During the maneuver, the helicopter's tail rotor struck a tree. No further details regarding the outcome of the landing or any injuries were provided in the source.
Engine Examination
An examination of the engine following the incident revealed no discrepancies. The engine was subsequently run successfully at a test facility, indicating no mechanical fault was found.