On October 30, 2021, a Rans S9 Chaos single-engine aerobatic aircraft crashed into a public street during an unscheduled low-altitude stunt display in Villa General Belgrano, Córdoba Province, Argentina.

The pilot, 35-year-old Fernando Endrigo, lost control while executing a vertical loop maneuver as part of a wedding celebration flypast. The light aircraft clipped a tree and struck two pedestrians on the ground—27-year-old Yésica Acuña and her three-year-old daughter, Isabella Santiago—before coming to rest against a residential structure. All three individuals survived with severe injuries.

1. Tactical Incident Breakdown

• Date & Operational Timing: October 30, 2021 | Afternoon Flight
• Location: Public street adjacent to the Villa General Belgrano Aero Club, Calamuchita Valley, Córdoba, Argentina
• Aircraft Model: Rans S9 Chaos (Light Experimental / Aerobatic Monoplane)
• Operator / Purpose: Private Aerobatic Display / Wedding Flypast (Rodrigo Cerioni Event)
• Flight Phase: Low-Altitude Aerobatic Maneuvering / Loop Recovery Phase
• Occupants: 1 Pilot (Fernando Endrigo, 35)
• Casualties: 0 Fatalities | 3 Serious Injuries (1 Aviator + 2 Ground Pedestrians)
• Airframe Status: Totally Destroyed by Obstacle Collision and High-Impact Forces
• Investigating Authority: Civil Aviation Accident Investigation Board (Junta de Seguridad en el Transporte – JST Argentina)

2. Sequence of Events & Incident Dynamics

[Takeoff from Villa General Belgrano Aero Club] ──► [Low-Altitude Dual Aerobatic Loops] ──► [Loss of Control at Low Altitude] ──► [Tree Collision & Pedestrian Impact] ──► [Airframe Disintegration & Extrication]

• Exhibition Departure: Operating alongside a second aerobatic aircraft, Endrigo took off from the municipal air club to perform low-altitude aerial maneuvers celebrating a local pilot’s wedding.
• Loss of Aerobatic Control: While attempting an inside loop at low altitude over a populated street, the Rans S9 lost airspeed and altitude during the downward arc of the maneuver, entering a steep dive.
• Street Impact: Deprived of sufficient vertical clearance to pull out of the dive, the aircraft severed tree branches, struck Acuña and her young daughter standing along the sidewalk, and slammed into the pavement.
• Rescue & Medical Transport: Volunteer firefighters extracted Endrigo from the crushed cockpit using hydraulic cutting equipment. The pilot was transferred in critical condition to the Private University Hospital of Córdoba with severe chest, head, and abdominal trauma. Acuña and her daughter received emergency surgical treatment at Córdoba regional hospitals for pelvic fractures and internal injuries.

3. Technical Summary Data