Incident Overview
The flight instructor (CFI) piloting the airplane initially reported that he was not performing aerobatic maneuvers. However, a review of the onboard airplane video by a Federal Aviation Administration (FAA) Air Safety Inspector revealed that the pilot had been performing aerobatic maneuvers in an airplane not certified for aerobatic flight.
Sequence of Events
During the flight, the airplane entered a spin, descended uncontrolled, and impacted a creek bank. The airplane sustained substantial damage to the engine compartment, wings, fuselage, and tail section.
Pilot Statement
The pilot stated that there were no mechanical malfunctions or failures prior to the flight that would have prevented normal airplane operations.
Aircraft Limitations
According to the Aero Sp. Z.O.O AT-4 LSA Pilot Operating Handbook, aerobatics and intentional spins are prohibited.