Accident Overview
A Piper PA46-500TP Malibu Meridian, operating a private flight from Västerås Airport to Prague, experienced an engine failure shortly after takeoff. The pilot elected to perform an emergency landing on Björnö Island, located slightly to the right of the flight path. During the landing, the aircraft struck the ground left wing first and subsequently rolled multiple times before coming to a stop. The impact caused both wings and parts of the tail assembly to separate from the fuselage, which remained relatively intact. All three occupants—a pilot and two passengers—escaped with minor injuries. A special study of the accident sequence determined that the left-wing-first impact allowed the wings to act as shock absorbers, significantly mitigating the forces experienced by the occupants.
Environmental Impact
The accident occurred adjacent to a secondary protection zone for the water supply of the city of Västerås. A substantial amount of fuel leaked from the wreckage. Following the accident, the site was decontaminated. Subsequent environmental testing revealed no traces of residual contamination in the soil.
Investigation and Probable Cause
The investigation determined that the engine failure resulted from damage to the engine's power turbine section. The damage most likely originated in a labyrinth seal associated with the power turbine; however, the precise cause of the initial seal damage could not be established. The technical failure was assessed as not belonging to a risk category with a high likelihood of recurrence. The accident was caused by damage to the power turbine that developed over time and was not detectable by the engine's maintenance program.