Right now it just suggests that there was no post impact fire. However we'll likely know soon whether that was from the fuel system maintaining its integrity, or there not being any ignition sources present or none that took any effect, or whether it was something else related or unrelated to fuel specifically, and/or mechanically in general. Mechanically, I'm very interested to know if it was something specifically engine related, as the Turbomeca Arriel 2B series of engines, especially the 2B1, are exceptionally reliable powerplants.