What happened
On June 6, 2025, a RANS S10, registration LV-X633, was performing a local aerobatic practice flight near the General Rodríguez aerodrome in Buenos Aires, Argentina. During the maneuvering phase of the flight, the aircraft experienced a structural failure involving the tensioners of the tail group. This mechanical failure resulted in a partial loss of flight control and a sharp deviation from the intended flight path.
In response to the loss of control, the pilot activated the aircraft's emergency ballistic parachute system. The deployment of the parachute allowed the aircraft to descend safely, though it ultimately impacted a private field adjacent to the aerodrome. There were no injuries to the pilot, and the aircraft sustained substantial damage.
The investigation
The preliminary investigation focused on the mechanical failure of the tail assembly and the subsequent emergency procedures. Investigators examined the aircraft' and confirmed that the failure originated in the tail group tensioners, which led to the loss of control effectiveness. The investigation also reviewed the flight parameters, noting that the aircraft was operating under visual meteorological conditions (VMC) in daylight at the time of the incident.
Findings
- The primary cause of the accident was a failure of the tail group tensioners during aerobatic maneuvers.
- The structural failure led to a significant loss of control authority and an uncontrolled flight path.
- The successful deployment of the ballistic parachute system prevented a high-speed impact and ensured the pilot's survival.