Accident
A twin-engine aircraft departed Tallinn-Ülemiste Airport on a mail flight to Helsinki with three crew members (two pilots and one mechanic) and a load of 514 kilograms of mail. Four seconds after lift-off from runway 08, while climbing to a height of 12 metres at a speed of 170 km/h, the left engine suffered vibrations. The power lever for the left engine was brought back to idle and then moved to a full forward position. Despite this action, the aircraft lost height, nosed down, and crashed in a wooded area located one kilometre past the runway end. Both pilots were killed, and the mechanic was seriously injured.
Investigation
The official accident investigation examined the aircraft and its systems to determine the cause of the crash. The analysis focused on the engine performance during the initial climb.
Probable Cause
The investigation determined that the right engine failed during initial climb following the rupture of a turbine ball bearing due to poor lubrication.