Ce n'est pas un pré-rapport, d'ailleurs, il n'y a pas de PDF, c'est simplement une chronologie des événements, qui a d'ailleurs déjà été évoquée ici.
Par exemple, la localisation exacte des trois incidents qui se sont succédés en quelques secondes n'est toujours pas connue :
First, the panel will collect and analyse all available data on the incident to reconstruct the events of 28 April and determine the causes of the blackout. These insights will be completed and published in a factual report. In the second phase, the panel will establish recommendations to help prevent similar incidents in future, which will be published as a final report.
...
First information on the chronology of events leading to the blackout.
The blackout is the result of a complex sequence of events for which ENTSO-E is providing a preliminary chronology with the information known so far. An in-depth analysis by the Expert Panel will be provided in a full technical report.
....