Originally Posted by
skadi
There is another video which shows the starboard side and there is also visible fire at or behind the engine bay. There is a titanium firewall between and aft of both engines. I don't think that <2min of flighttime is enough to break these walls with fire.
skadi
It is not the firewalls, the problem is that structure, attaching tailboom and/or tailboom itself failed. Tailboom is completelly made of composite, while attachment flange and fuselage is metal structure - Aluminum and titanium apron and firewalls. I worked many years on EC-135 and am astonished how fast the fire destroyed the primary structure. Like Concorde in Paris.