Incident Overview
On 21 October 2023, a Cessna TU206G (registration SP-ASG) operated parachute jumps from Leszno Airport (EPLS) to an undisclosed location. After completing eight flights, the pilot departed for a return flight to Lubin Airport (EPLU) at approximately 17:10 local time. The flight initially proceeded normally.
Sequence of Events
After crossing the Oder River at an altitude of approximately 2500 feet AMSL, the aircraft experienced a brief jolt from the propulsion system lasting about two seconds. A red warning light on the instrument panel illuminated, indicating a drop in oil pressure in the propeller blade pitch control system. Turbine N1 RPM and torque began to decrease rapidly. The pilot's attempt to increase engine power was unsuccessful; the engine shut down and the propeller blades feathered automatically.
The pilot maintained airspeed and selected a field for an off-airport landing, away from forests and buildings. Simultaneously, the pilot reported the situation to FIS Poznań. The landing was uneventful, and the aircraft sustained no damage.
Injuries and Damage
The pilot did not sustain any injuries. The aircraft was not damaged.
Findings and Cause
Maintenance personnel from a certified repair organization examined the aircraft at the scene and identified a failure of the propeller speed governor (PT Governor) of the turbine engine, model Allison 250-C20S. The defective component was sent to a certified overhaul facility, where an internal fault was confirmed.
The investigation determined the cause of the incident to be a mechanical failure of the propeller speed governor.
Contributing Factors
No contributing factors were identified.
Safety Actions
No safety recommendations or preventive actions were formulated.