What happened
On November 11, 2022, a pilot operating a TL-300 and registration OK UUA 92 conducted a series of flights from an unregistered airfield near Wejherowa. During the first two flights of the day, the pilot observed rapidly increasing engine coolant temperatures exceeding permissible limits, which necessitated immediate landings. Despite these warnings, the pilot proceeded with a third flight carrying a passenger.
During this third flight, the engine control unit (ECU) issued several warnings as coolant temperatures rose again. Approximately two and a half minutes after takeoff, the engine power began to fluctuate and eventually failed entirely at an altitude of approximately 30 meters. The pilot attempted to return to the airfield but transitioned to an emergency landing in a nearby agricultural field. The aircraft touched down with significant side-slip and excessive vertical and forward speed during a turn, encountering a quartering tailwind. The impact caused the landing gear to collapse and the engine to strike the ground, while the left wingtip also made contact with the earth. The aircraft sustained severe damage, including the separation of both wings from their mounts and structural damage to the cockpit.
The investigation
The PKBWL investigation examined the flight data recorded by the Garmin G3X system, the engine's ECU, and the physical state of the aircraft. Investigators analyzed the aircraft's flight path, the engine's performance parameters (RPM, fuel pressure, and oil pressure), and the meteorological conditions at the time of the accident. The investigation also reviewed the pilot's actions during the engine failure and the subsequent emergency landing procedure.