Westwind, can you refer us to the accident report? (hopefully in English?)
We use a Falke motor glider at Shenington Gliding Club. I am a retired instructor and tug pilot, but NEVER got happy with the Falke, or for that matter with the more modern motor glider I tried to manage in the US....the requirement, if you wished to restart the engine airborne, to FEATHER/UNFEATHER the prop, and DIVE to start it!. I was too feeble to feather or unfeather, and I didn't like the idea of having to dive to start the engine. This was a Grob motor glider.
So for me I much prefer either a power plane, OR a glider. And the Falke is very very feeble as a power plane, and not a very good glider either, though it gets a lot of use at our club, I am still uncomfortable every time I see it struggling to takeoff.
Derek Piggot recommends the Falke or other motor glider for the basic glider training of takeoffs/landings. I don't like it for that purpose either, you are seated side by side rather than tandem. And it makes too much noise!.....