Originally Posted by Stubenfliege 2
My problem is for instance: Is the double engine failure of the Qatar A330 back in 2006 an "Incident" or a "Accident" which has to be investigated by the official bodies in accordance to ICAO Annex 13?
"Has to be..."? "Accordance". I think there is some vestige of a misunderstanding of international law.
What constitutes an incident or accident is for national authorities, who are sovereign in their airspace, to decide (or not) in national laws.
The ICAO agreement is deliberately vague in its wording, so that it fits the definitions of its member states at the time the agreement was formulated.
So, the way to answer your question is as follows. First find out who has jurisdiction over the event. Then look up that country's laws concerning what constitutes an aeronautical incident or accident. Finally, classify accordingly.