Interesting point. He did spend several months or possibly more in the US (in Arizona, I believe) qualifying for some other certificate, so perhaps he came and went on his job. That is, he may have had long education leaves that would have meant he accumulated fewer flying hours.
BTW, in the US, he learned to fly gliders and other very simple aircraft. Don’t know if this is relevant, but essentially he did a glide into the mountainside.
Interesting point. He did spend several months or possibly more in the US (in Arizona, I believe) qualifying for some other certificate, so perhaps he came and went on his job.
Arizona is where Lufthansa and most other European and Asian airlines trains much of their pilots.
Most probable scenario is that he locked the Pilot out of the cockpit, set the autopilot on 100 ft AGL (which would certainly crash the plane flying in the Alps) and then killed himself.
It’s unlikely he was alive when the plane hit the ground.