What happened
On December 14, 2009, a Beech A36 was prepared for a VFR flight from Osnabrück-Atterheide (EDWO) to Damme (EDWC). While parked at Hangar 10, the pilot discovered that the aircraft battery lacked sufficient power to start the engine. To resolve the issue, a local aviation maintenance company provided a battery cart and a mechanic.
During the troubleshooting process, the engine could not be started via the aircraft's external power socket due to a failure in the internal external power relay. To bypass this, a jumper cable was used to connect the external battery directly to the aircraft's onboard battery. This procedure required the right upper engine cowling to be opened.
At approximately 11:36 local time, a trainee mechanic approached the front of the aircraft and positioned himself near the propeller area. During an engine start attempt, the engine briefly caught and ran. The rotating propeller struck the trainee, resulting in one fatality.