@ torpendtorque:
dont get the accidents/incidents mixed up. The low-g i referred to, happened during one of these tryout flight were a passenger gets to touch the controls from the left seat. After the passenger applied too much aft cyclic, the instructor responded with forward cyclic to stop the climb. This low-g situation is the moment, the engine quit.
After entering autorotation, the instructor succesfully restarted the engine and flew back to base safely.
The other incident didnt involve low-g, but a sudden throttle chop in order to iniciate a practice autorotation. Again, the engine quit, though different machine.
All the above happened in Germany. Finally there is the accident this thread is actually about. In this case, no one mentioned low-g in the first place.