Preliminary data based on the notification from the Spanish authorities:
The aircraft, which was in route, requested to descend to flight level 130. The air control service authorized it to descend to the requested flight level; but when the aircraft was at flight level 364, it instructed it to stop at flight level 360. The aicraft descended below flight level 360 with the autopilot on and the pilot manually attempted to recover flight level 360. It was in this maneuver when the passenger fell and broke a leg.